What Do Programmers Do Research Paper Example | Topics and Well Written Essays - 1250 words

What Do Programmers Do - Research Paper Example These devices came through the hands of experienced programmers. Much worse case is that they fail to recognize the difficulty and significance of the job. To gain better comprehension of what programmers exactly do or clarifications of misconceptions will assist people into achieving a sense of deeper appreciation for both the professionals and their craft. A professional even once said that what people commonly think that programmers delve into a field that is encompassed by pure science is inaccurate. Programmers actually are more like artists in their profession (Dollery 1). Additionally, it can be described as an interesting and stable choice of profession nowadays with the continuous advancement of the computer age (â€Å"Information Technology Jobs in America: Corporate & Government Career Guide† 29). There are numerous approaches one can take to become a professional programmer aside from attaining a degree in computer science or software engineering. There are unconve ntional ways where one programs accidentally or one has an interest in programming therefore adopts it as a past time (George 1). Comparing computers in the past and present, it is obvious at how it has remarkably evolved and continuously pushing its limits, if there are any. Through this, one can also expect that the field of programmers and the nature of their profession have also and will continue to metamorphose throughout the future (Morley 718). The Programmers’ Job To avoid any obscurity about the description of a programmer’s job, it can easily be broken down into three steps—writing the program, testing the program and debugging it if errors are found then testing again until the correct function has been achieved. In some ways, programmers identify their expertise similar to those of writers only much rigid (Seibel 299). What really make the jobs of programmers enigmatic are the various, distinctive languages they utilize for the development of program s. In fact, programmers are burdened with understanding numerous languages if not all during their course of education to assure their adequacy in a task (Morley 572). It is an imperative that people who delve into this profession know a handful of programming languages. For instance, in America, they demand experience in C++, Java, JavaScript, VisualBasic, Cobol or Fortran which are popular programming languages (â€Å"Information Technology Jobs in America: Corporate & Government Career Guide† 116). Furthermore, a computer programmer is equipped with many essential skills. To be the best in their craft, these professionals are expected to have acquired a basic skill in debugging where the planned operation goes otherwise and they have to be able to find it, figure it out and correct the problem (Read 5). This might be simple enough but it requires cleverness and artistry. Though there are tools available for the professionals, a specialized knowledge must be accomplished be fore once can debug with ease. Some expert programmers even say that to be where they are, it took a lot of hands-on experience (Seibel 4). Finally, programmers, as with all professionals, are assigned with the task of unit testing which assures that all their developed programs are efficiently working. In this final stage of production, there is quite a demand not only in skill but also a good working relationship (Helgeson 240). It is said that in our age even our advancements require continuous

Discussion Essay Example | Topics and Well Written Essays - 250 words - 32

Discussion - Essay Example In addition, crowding is usually associated with poverty since poor households are usually at higher risks of catching fire (Jennings, 1996). Fire incidences in crowded areas have always had severe impacts as compared to areas that are less crowded. Usually, low income earning families usually live in masses that include the extended family and friends owing to the lack of affordable housing. This increases the number of victims in cases of fire (Jennings, 1996). In addition, Jennings (1996) argues that when many people are in a household, it makes it difficult to rescue everyone especially for old people and children who cannot run from the fire. Crowded homes are a suggestion that the members are poor, thus their houses possibly lack smoke detectors. In case a fire occurs the occupants will have limited time to escape and thus makes them unable to reach neighboring households and alert or rescue them. It is imperative that safety measures be taken to address the fire issue in crowded areas so as to save lives in case of fire

Belonging to Place Essay Example for Free

Belonging to Place Essay Have you ever been in a room packed full of people, yet no matter whos around, you cant shake a feeling of un-ease, or a sense of not belonging? This has probably happened to each of us atleast once before. Belonging is usually defined as just generally being accepted, we assume its a reference to someone being treated differently to others, whether its for better or worse. But sometimes, it has more to do with the place we are in, rather than the people who are around. To prove this, Ill be discussing Shakespeares As You Like It, a romantic comedy set in a ficticious world, where the illustrious Court is supposedly the place to be for educated citizens, and the Forest of Arden, a place of exile, is thought to be harbour to many theives and those discarded from society. The dramatist uses techniques such as imagery, metaphors and dramatic irony to highlight key aspects of belonging and not belonging. In contrast to this text, Ill also examine My Sisters Keeper written by Jodi Picoult, where the sense of place is not physical, but familial. Picoult uses similar techniques to Shakespeares in As you like it, with imagery and irony used as common themes through-out the text. As You Like It revolves around Rosalind whos uncle, Duke Frederick banishes several characters from city life in the French Court. But when Rosalind herself is exiled, her cousin Celia declares that she will join Rosalind, and that they must go to the Forest to seek the rightful Duke, Rosalind cries Alas, what danger will it be to us, maids as we are, to travel forth so far! Beauty provoketh thieves sooner than gold This is where Shakespeare introduces the reputation of the forest, known as a dark and scary place of banishment and explains Rosalinds sense of obligation to dress as a man and call herself Ganymede, as she feels she must protect herself and her cousin. Throughout the text Shakespeare uses symbolism in many different ways. He commonly uses metaphors or similies not only to describe things, but sometimes to give them a double meaning. An example of this being Rosalinds choice of alternative identities, when she picks the name Ganymede, who in Roman myhtology is a cupbearer and a symbol of homosexual love, this adds to the continuum of sexual possibilites. When Orlandos selfish brother Oliver first causes him to join those exiled into the Forest of Arden he fears for himself, and his servant Adam, yet his opinions of the forest change when he meets Duke Senior and his comrades. Hath not old custom made this life more sweet than that of painted pomp? Are not these woods more free from peril than the envious court? The Duke asks him. Eventually others come to realise that their impression of the forest was also wrong, and that it has the potential to give them true happiness. As opposed to finding a physical place, Jodi Picoult demonstrates a different kind of belonging. Sara and Brian Fitzgerald dedicate their every moment to their middle daughter Kate, who is suffering from leukemia, leaving their other two childern, Anna and Jesse, feeling like they have no place in the family. This affects Anna in particular, as she was concieved in a lab to be used as spare parts for Kate, and made to donate things like stem cells and bone marrow. She is pushed too far when she is told she has to donate a kidney to her sister, and seeks medical emancipation, leaving her feeling even more out of place in the household. The eldest child Jesse however, rebels his own way by committing arson and petty crimes. Throughout the book Picoult uses this allusion to fire for many things; Kates uncontrollable illness, which seems to destroy everything within its path, or Anna initiating the law suit, like shes starting a blaze that she might not be able to contain. It is again used as a comparison to Kates disease, by her father Brian, who is a firefighter, when he suggests that some fires need to be left alone until they burn out. Though both texts have clear links to family, another aspect they share is great irony. In As You Like It, dramatic irony is used quite often because we, as the audience, always know something that the characters dont. When Rosalind, acting as Ganymede, ends up weaving a very tangled web for herself, she is the character who comes to help everyone achieve their happy ending, and find their rightful place. Shakespeares use of this technique brings great entertainment, and adds to the comedy. However, in My Sisters Keeper the irony is not so comedic. Jesse announces in court that Kate had forced Anna to stop donating organs as she was ready to let her luekemia take her life. Leaving the courthouse, after winning her case, Anna and her lawyer are caught in a terrible car accident, resulting in her giving her kidney to Kate before she passes, this helps Kate to fight off her cancer. Through this Picoults use of irony, much different to Shakespeares, allows Anna, who never knew her part, to help her sister find her own place in the world. In conclusion, the very different texts both highlight aspects of belonging, or not belonging, to a certain place. Whether its physical place or a role that you need to find. The Authors use of techniques such as imagery and irony, and as focus on relationships involving both love and hate, helps to convey what belonging truly means to them.

Factors Affecting Consumer Buying Behaviour

Factors Affecting Consumer Buying Behaviour In the early history consumer behaviour has led to theories, research methods and background knowledge of the consumer economy and self-service concepts. Consumer behaviour in the 1950s is based on the concept of marketing through various alternative approaches. Widespread adoption of the marketing concept was the impetus for the study of consumer behaviour (Consumer Behaviour, Leon G. Schiff man, Leslie lazar Kanuk and Havard Hansen). To identify the unmet needs of consumers, companies have participated in extensive market research. So, they discovered that consumers are very complex, subject to various psychological and social needs. Thus, the concept of marketing has emphasized the importance of consumer research and laid the groundwork for the implementation of the principles of consumer behaviour in marketing strategy. It is interesting to note that even before the evaluation of the marketing concept, an intuitive understanding of consumer behaviour has been the key to the growt h of businesses. INTRODUCTION Now-a-days the organisations in any industry are concentrating on the gratification of the consumer needs and desires to run their business operations and eventually develop their business. Organisations are introducing number of activities to make the end user satisfied outside their business operations. (Anderson and Sullivan, 1993). Consumer Behaviour is the process individuals or groups go through to select, purchase, use and dispose of goods, services, ideas or experiences to satisfy their needs and desires. -By Solomon, Marketing Real People, Real decisions, Page-148 Sprott (1958) believes that the group of people around the consumer has become important factor to consider in the consumer buying decision in any industry. He also made known clearly that the group is number of people who act together, that may be a family, may be friends, and may be neighbours. The group that affects the buying behaviour of the consumer is also called Reference group. 2. FACTORS AFFECTS TO CONSUMER BUYING BEHAVIOUR The aim of marketing is to satisfy their customer needs and wants (Kotler, 2003; 182). The field of consumer behaviour is to identify that how a customer buys, uses any product and services and dispose it. Schiff man (2002) states that it is never simple to identify and understand consumer needs. However, the behaviour of consumer depends on some factors. There are number of factors in the study of consumer behaviour which plays important role in buying of any new product or services from the selling firm such as customer income, culture, technology, various types of personal factors. 1. Cultural factors: In the field of consumer behaviour, the cultural affects most to the consumer behaviour and within different types of societies. Managers of any firms must have to consider about psychological and behavioural effects (Cleveland and change, 2008). However, the subculture, social class are the also important factors of consumer behaviour. The firms can capture the picture of consumers needs and to identify their wants by indentifying the cultural of their societies. In addition, the cultural is the norms, rituals and traditional among the society (Solomon, 1999; 16). Rosenthal (1992) who identify that within culturally heterogeneous societies like the United States, and the countries of Western Europe, the psychological and behavioural consequences of ethnic group membership are of considerable importance. It is one type of lens through which people can view product and services. The consumer choices cannot be identified without taking culture context in which they are made. On the oth er side, there are some social activities and cultural activities which are considered to obtain the consumer behaviour (Foxall, 1993). Generally, the culture can be divided into the three parts namely cultural, sub-cultural and social class. The role of sub-cultural is to identify the nationalities, religions and geographic regional. In addition, it is quite important to understand about sub-cultural because it helps to the firms to provide the best services and product in the market size (Schiff man Kanuk, 2007). In addition, the all human societies exhibit social stratification and some time, it takes the form of a caste system. However the social class not only includes the income of person but it shows the level of education and occupation (Kotler, 2004; 185).The social class is not same in dressing style or speech patterns but it is different. So in the current situation, it is important to identify the dimensions of cultural before they are going to sell product and services (Solomon, 2007). In addition, the following is the theoretical model of the culture which identifies that how the cultural is affect to the consumer behaviour. Above diagram which presents that the consumer behaviour which is based on culture, values and social norms factors. and in addition, it shows that not only national culture is influence to the behaviour but also there are some religion, value, ethnic level which important when any customer is going to buy any product and services, However, Karanhanna and Evaristo (2005) who argued that the levels of the different cultural is based on the nature of consumer behaviour, thus behaviour which is include strong value and sub cultural. 2. Social factors: Human beings are social animals and our desire is to fit it and or to identify by individuals or groups which are the primary motivation for buying product and services in the services industry. After the cultural factors in the study of consumer behaviour, the Social factors also affect the consumer behaviour. From the early year, Peterson (1987) found that socialization which is determined the way of patterns of behaviour or the process by which the person can adopt social roles. Where the family is more powerful social factors, it affects the consumer behaviour rather than social norms. Furthermore, the social factors include self concept and personality. This social factors is affects by reference groups and family and social roles and statuses (Kotler, 2003; 184). A reference groups of person which include different types of groups like friendships groups, work and shopping groups that impact on consumer behaviour. 3. Personal Factors: The consumer behaviour also depends on the personal characteristics. The way of the consumer behaviour is determined by buyers age and stage in the life cycle, personal occupation, economic circumstances and lifestyle of person and also behaviour is affects by personality and self concept (Kotler, 2003). In addition, in the lifetime, people are not buying the same product and services, their need of product and services are changed by time to time. For the example, in the early year, the person used pager for the communication but nowadays, they are different, they prefer to buy mobile for the purpose of communication. Solomon (1999) argued that in the traditional societies, the lifestyle which is affecting a pattern of selecting product and services and also reflecting a person choice of how he/she spends time and money. In addition, today consumer is buying product and services over others because they are connected with other person lifestyles. However, the research found that the lifestyle of the person is changing by time to time. Nowadays, advertising is become most affecting factor to the consumer behaviour, because advertising is become essential to get information about new product and it result in better products for the public. Furthermore, the personality, product quality, self concept and self power, the way of product display methods are the major factors which impact on consumer behaviour in the services industry (Schiff man and Kanuk, 2007). 4. Psychological factors: Psychological factors play important role to determine the consumer behaviour. These factors are affected by four major factors like motivation, perception, and learning. This psychological factor decides the personality and lifestyle. The demonstration influence is also dependent upon psychology of an individual. Nowadays, learning is the major factors in the study of consumer behaviour because when people act, at that time, they learn something (Kotler, 2003). Furthermore, Learning can change the consumer behaviour from experience. Most of behaviour is learning from the current environment. Personality, lifestyles and attitudes are the major characteristics of consumers which provide understanding about consumer behaviour into the services industry (Schiff man, 2007). Consumers have a wide range of attitudes towards the product, services, advertisements, and internet and towards retail store. Whenever, any customers ask him/her self about product and services, at that time, we are being asked to express our attitudes. If any marketer wants to understand about attitudes of consumer, they need to understand about consumer beliefs towards product or services brand (Kotler, 2003). These beliefs and preference is attributing to define consumers attitudes towards a brand. In the study of consumer attitudes, the lifestyle is the most important concepts to understanding consumer behaviour (Simon, 1999). Most of researchers agree that there are three components like affect, behaviour and cognition. These all components are connected to each other. Where the affect which refers t o the attitudes object and in Behaviour, customer involves intentions to do something towards their attitudes object. The cognition refers the belief on attitudes object. This model of attitudes is called ABC model (Simon, 1999; p.207). To define the market, it is important for marketer to know about what customer is like or dislikes. However, from the early years, the researcher was estimated that family decision is one of important factors that affect on consumer purchase decision (Simon, 1999). In addition, Bonnet who identify that attitudes towards food product or high risk involving product is comes from family .However, the peer group, personality are the also major affecting factor which applicable to change customer buying behaviour. 3. CONSUMER BUYING DECISION MODEL From the early year, the research suggest that following is the way where customers go through five stages for their decision making process to buy product and services. This model is implies that customer pass this all stages in every single purchase process but some time, customer is not going to pass, they often skip or reverse some of the following stages. Need Recognition Information Search Evaluation of Alternatives Product Decision Post-Purchase Decision Table 3.2 (Stages in consumer decision making model) (Source: Marketing: Real People, Real Decisions by Solomon p.150 and Kotler, 2003, p.204). 1. Need Recognition: The process of the consumer buying decision process starts with problem recognition. This steps occurs when customers sees a significant difference between her/him current state or desired state (Bruner, 1987,) .At this phase, the consumer is faced with problem which may be large and small or complex (Solomon, 1999).The problem of the consumer at this steps depends on the nature of her/him needs, it also depends on environment where customers is living. This need which can be drive by either an internal (hunger) or external (passing through burger king stimulates hunger) stimuli. Some of demographic factors like Age, sex, income, education and marital status which are also inferred influence which affects need recognition. In addition, the Psychological factors like motivation are also basic of all consumers (Solomon and Michael, 2007). Moreover, Kotler (2006,) who argues that the perception factors reflect helps how the customers see her/him self as well as their surroundings. This perception is not only important for need recognition phase but also affect to other relevant phase. 2. Information search: In the consumer decision making process, once the problem has been recognized, they need to search some relevant information to solve it. In this phase, where the customer uses different types of way to gather information to fulfil their needs discussed above. Generally, the customer is going to search information by internal or external method. Internal sources applicable, when customer has a some memory about product or some have degree of knowledge. (solomon,1999;274-275).In contrast, where there is need more information about their needs, at this situation ,Generally , customer is prefer to use internal sources like to use advertising, friends, family, point-of-sale displays, radio, magazines. Nowadays, Internet is become necessary tools to adopt information. In addition, the use of an internet has rapidly grown from its early years (Comegys and Hannula, Vaisanen, 2006,). Moreever, in the services industry, customers prefers internet to choose product from information. 3. Evaluation of alternatives: After facing information about their needs, The third phase is evaluation of alternatives where generally, customer is focus to set up rules for choice of product and services, In addition, this phase is evaluate the way of choice of product and services like how does the customer process competitive brand information and make final judgments towards product ( Kotler, 2003; p.205-206). Kotler also identify the several concepts which contribute to understanding into this phase, where first of all, customer is mostly trying to get satisfaction towards needs. Second, the customer is looking certain benefit for their problem. Third, customer is sees product with different types of brands with their attributes, here attributes of customer is vary by product. However, the customer is try to find the alternatives for their product by set of brand beliefs where the each brands stands on each attributes. 4. Product decision: After evaluation stages, once the relevant category is established from the above phase , the choice must be made among them (putsis and srinivasan,1994 ).Here is the process which needs more attention on desired choice .The choice can be influence by internal factors like experience on product and services . First is an attitude of the others, where the attitudes of friend, family, social community which affect to the change the decision on desired choice. secondly, there might be some unexpected situational factors like price of choice product is suddenly gone up (Dubois, 2000).Furthermore, Dubois (2000) submits that when the customer is going to make purchase decision, at this time, still there is need to make some sub purchase decision like way of payment method, time of purchasing where the payment method and price is more major factors affects into mobile services industry. However, some times, the purchase decision phase fails because of perceived risk (Taylor, 1974,).Lack of confidence, the amount of attribute uncertainty are the major influence factors in the purchase decision stage. 5. Post Purchase Behaviour: After the Purchase decision, the post purchase phase occurs. Generally, if any sales representatives want customer come back again towards store, they should be able to understand the behaviour of customers. The post purchase phase is a complex process where satisfaction of customer is utilization. One of Researchers Henard, (1988) submits that the customer satisfaction evaluations can be influenced by consumer expectations and perceptions. Moreover, The Atmospherics is also plays important role in this phase (Hoffman and Turley, 2002). This phase can be divided into two way: post purchase satisfaction and post purchase actions (Kotler, 2006; 198-199) where generally research suggest that if the customers come back to the store, it means they are dissatisfied but Oliver (1999; 33-44,) argued that it does not mean that when customer come back because of being satisfied, they might be other reason when they come back. In addition to satisfaction in this phase include brand preference and repurchase intentions and how it is affect. Here brand is one of major factors in the services industry which is affect on satisfaction about product and services. 4. CONCLUSION Consumer buying process is an understanding of the appropriate fundamentals that impact upon individual buying decision making and the general process through which individual behave and make the decision is an imperative first stage in the development of any marketing communication plan (Fill, 2002), upon the basis of that understanding, marketer device the plan and try to implement well with the sales figure. But, despite all their efforts to pre-sell consumers through advertising, marketers increasingly are recognizing the significant degree to which many purchases are influenced by the store environment. It has been estimated that about two out of every three supermarket purchases are decided in the aisles. The proportion of unplanned purchases is even higher for some product categories (Solomon, 2002).The essay mainly deals with the theoretical approach to the consumer buying behaviour and provided the background about consumer buying behaviour in terms of organisation. However, in the first part of this essay is presented that it is important to understand consumer buying behaviour for firms that why consumers make the purchases that they have done and what type of factors affect to the buying behaviour. This essay also investigated the types of factors affect more to the consumer buying behaviour which is main objectives of the conducting research. Moreover, the essay also contains the theory about consumer buying decision model.

The Pitiful Characters of Othello :: Othello essays

The Pitiful Characters of Othello      Ã‚   In Othello, no "good" love exists between any of the characters. Shakespeare creates a cast of romantic and platonic couples whose affection is weak and unsustainable. Iago, not Othello, is master of this play; he establishes all the action. There is an underlying weakness and depravity in all the characters, or Iago would never have been able to ruin so many lives. But Iago is unswayed by the external; his black heart is his only guide.    When Iago tells Roderigo to awaken Brabantio and set the wheels of distrust in motion, he is loud and boisterous, even vulgar. He says, "Rouse him...Do, with like timorous accent and dire yell as when by night and negligence, the fire is spied..." (1.1 75, 82-84). Iago is interested only in the act of alarm. We imagine him lurking around the canals, sticking his bony finger into every soul to testing their limits and act accordingly. He has no conscience. For Iago, there is nothing bigger than he to temper his need to destroy.    Iago's bad behavior sets the tone for all other interactions in the play. He has no need for honesty or affiliation; he uses his wife to further his plot, betrays Roderigo, cares nothing for Cassio, and loathes Othello. He is a foil for characters who may know right from wrong but are not passionately committed to acting for good or evil. Shakespeare mirrors this noxious model in other characters' relationships. Desdemona rebels against her father; the Duke takes Othello's side; Roderigo is so lovesick that he will stoop to any level to win Desdemona. Even in the primary romantic relationship, Othello's and Desdemona's, the love is flimsy and easily broken.    Neither Desdemona nor Othello gush about the heavenly course their love has taken - never do they claim to be "star-crossed lovers." The origin of their love lies in the myths that Othello has fashioned from his travels and conquests, not in common interests or a compatibility of spirit. Desdemona can only imagine what Othello's life is like; she is too passive to ever truly live. Though some may argue that this love is mature and doesn't need Romeo-style proclamation, it is clear that Shakespeare has built their relationship on sand.

Influences Of The Renaissance Upon The Founding Of America :: essays research papers

The Renaissance was the most influential time period in the discovery of America. During the Renaissance, which lasted from the 14th century to the 17th century, great advancements were made in methods of navigation. Also, the greatest goal of almost every nation and empire was to claim new lands and seize its riches. The desire for the land motivated some to move westward. Another motive to expand during the Renaissance was the will to convert the native "heathens" into Christians. The Renaissance, which began in Italy in the 1300s, was one of the largest periods of growth and development in Western Europe. Navigation was no longer limited to traveling about by land. Large fleets of ships were constructed, and great navigational schools, the best founded by Prince Henry the Navigator in Portugal, were founded. People were no longer tied to the lands they lived on, as they were in medieval times. They were freer to learn new skills and travel. These enabled people to go further than they had before. Fleets of ships were sent to the Eastern world to bring back treasures and valuable spices. Routes to Asia were traveled beginning in the early Renaissance. The most posing problems with the set routes to Asia, which went around the Cape of Good Hope and along the coast of Africa, were that it was very dangerous due to enemy colonies along the route and was also very long. These problems made some people, including Christopher Columbus, decide to turn to the west to find safer and faster routes to the riches of Asia. What they found was the Americas. Believing that he would reach Asia, Columbus accidentally found a new continent, full of new riches and unclaimed lands. All of this occurred near the end of the Renaissance, beginning with the founding of America in 1492, near the end of the 15th century. Europe flocked to this New World, and founded many colonies, including the Thirteen Colonies, founded by Great Britain, which later became the first states in the United States of America. From these colonies, they extracted the wealth of and gold and spices that they sought in Asia. Additionally, they would convert the native people of the lands to Christianity. Columbus saw himself as a messenger of G-d, who brought salvation to the natives by converting them. Missionaries were built wherever a colony was founded, and often along the route of an exploration.

Connective Tissue

Connective Tissue Characteristics of connective tissues †¢Extracellular matrix separates cells †¢Most widely variable of tissues †¢Many varied functions †¢Common (mesenchyme) origin †¢Degrees of vascularity Functions †¢Binding †¢Suport †¢Protection †¢Insulation †¢Transport Structural Elements †¢Fibers ?Collagen (white) fibres ?Elastin (yellow) fibers ?Reticular fibers †¢Ground substance ?Amorphous material fills space between cells and contains fibers ?Holds fluids ?Acts as molecular sieve ?Consists of interstitial fluid, cell adhesion proteins â€Å"glue†, proteoglycans †¢Cells Each class of connective tissue has a fundamental cell type that exists in an immature and mature form ?Undifferentiated cell gets suffix â€Å"blast† i. e chronoblast, they are actively mitotic, secrete fibers and ground subtance ?Once the cells synthesise the matrix they assume their less active mature mode indicated by suffix â €Å"cyte† i. e. lymphocyte Summary Fibers Ground Substance Cells Collagen Interstitial fluid Immature form â€Å"blast† Elastin Cell adhesion proteins â€Å"glue† Mature form â€Å"cyte† Reticular Proteoglycans Types of connective tissue †¢All consist of cells surrounded by matrix Differences reflect cell type, finer type and the proportion of matrix contributed by fivers †¢These differences determine connective tissue classes and their subgroups ?General (fibrous) connective tissue â€Å"proper† ?Specialised Connective tissues (skeletal – bone and cartilage, adipose, lymphoid, blood) Cells found in ‘Prototype' Connective Tissue †¢FIbroblasts †¢Adipocytes (fat cells) †¢Cells which migrate from blood ?WBC ?Other cells concerned with tissue response to injury Connective Tissue Proper Two subgroups – classification mainly based on finer arrangement and density: †¢Loose CT Areolar ?Reticular †¢Dens e CT ?Dense regular ?Dense irregular Connective Tissue Proper Sub groups Characteristics/Structural elements Loose Areolar Semi fluid Gelatinous ground substance Collagen, elastin, reticular loosely distributed Fibroblasts and macrophages are abundant Occasional adipocytes (fat cells) Widely distributed packing material of body Loose Reticular Matrix contains reticular fibers Reticular fibers form network of reticular cells (fibroblasts) Dense Regular Closely packed collagen fibers orientated in same direction Mainly fibroblasts Poorly vascularised (no blood vessels)White, flexible tissue with great tensile strength in one direction Wavy fivers – allow minimal ‘give' until fibbers are straightened Elastic CT has high elastic content i. e. ligaments and tendons Dense Irregular Closely packed collagen fibers orientated in same direction Mainly fibroblasts Poorly vascularised (no blood vessels) Collagen bundles are orientated in MANY directions Forms sheets where tension i s exerted in from many directions i. e. dermis of skin, fibrous joint capsules, fibrous capsules of many organs (kidneys, testis, bone, muscles) Blood †¢Classified as a connective tissue †¢Cells in matrix (plasma) Fibers are soluble proteins which only become visible during clotting †¢Functions ?Transport of nutrients (glucose, oxygen) ?Transport of wastes (CO2) ?Transport of gases (oxygen, CO2) ?Hormones Cartilage †¢Somewhere between dense CT and bone †¢Tough but flexible †¢Cartilage cells â€Å"chondro† prefix †¢Ground substance has firmly bound collagen fivers †¢Contains lots of tissue fluid (80% water) †¢No blood vessels or nerves (good for joints) †¢Perichondrium (dense irreg. CT) surrounds most cartilage †¢Growth both interstitial and appositional †¢Types: ?Hyaline ?Elastic ?Fibrocartilage Bone â€Å"Bone† can refer to: Osseous tissue (type of CT) †¢Organs of the body i. e. humerus (consisting of se veral tissue types) Bone as a tissue †¢Bone is connective tissue (osseous tissue) †¢Cells contained in a matrix †¢Matrix is hardened by deposition of calcium salts and other minerals = calcification (mineralisation) Functions of bony skeleton †¢Support †¢Protection †¢Rigid attachment †¢Levers for muscles †¢Blood formation †¢Electrolyte balance †¢Acid base balance †¢Detoxification General features of long bone †¢Compact bone †¢Spongy bone †¢Medullary cavity †¢Diaphysis (shaft) †¢Epiphysis †¢Epiphysis plate/line †¢Articular cartilage †¢Periosteum and endosteum