A group of similar cells along with intercellular substances which perform a specific function. Useful notes on the epithelial tissues of human body. Gk on animal tissues and their functions pdf notes. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Tissues and cells microscopic anatomy did you know that you are made up of only four tissue types. Muscular tissues connective tissues urogenital system lining of body cavities and blood vessels endoderm becomes.
Connective tissue definition of connective tissue by. It is composed of variety of cells, fibre nonliving products of cell and semisolid matrix between cells. Winner of the standing ovation award for best powerpoint templates from presentations magazine. They provide internal support as well as give and maintain form to the body. Dense connective tissue is composed of large amounts of closely packed collagenous fibers. Science class 9 notes free download pdf chapter 6 tissues. Connective tissue ranges from avascular to highly vascular. Introduction to tissues these cells are organized into four basic tissues that, in turn, are assembled to form organs.
Such a tissue possesses varieties of subtypesgeneral or ordinary connective tissue, haematopoietic tissue, and specialised tissues which include cartilages, bones, joints and others. Tissue classification connective tissue epithelia muscle nerve extracellular matrix extracellular matrix continuous. Reticular connective tissue loose connective fine interlacing fibers and cells. Connective tissues are the major supporting tissue of the body. The fibrous elements are collagen fibers, reticular fibers and elastic fibers. These tissues create padding beneath the skin, kidneys, and eyeballs. Connective tissues make up the connecting or supporting framework for most of the organs of the body. Connective tissue, group of tissues in the body that maintain the form of the body and its organs and provide cohesion and internal support. Structural organisation in animals ncert notes download pdf. It is thicker and stronger than loose connective tissue and forms a protective capsule layer around organs such as the liver and kidneys. As the name suggests a connective tissue acts as a connecting medium, with some specialized functions.
In comparison to loose connective tissue, dense tissue has a higher proportion of collagenous fibers to ground substance. The connective tissue is derived from the embryonic mesoderm. Connective tissue in organs contains much less collagen and is more cellular. Made of hard matrix provides strength, and protein fibers including collagen provide strength and flexibility functions. The following information identifies a few select features of connective tissue. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Some of the individual fat cells are often broken during tissue preparation, but the overall impression of what the tissue looks like is the important point. Transmit messages nerve impulses from one part of the body to another. Consists of webs of fibers and a variety of cells embedded within a matrix of soft,sticky gel. Tissues class 9 notes science mycbseguide cbse papers. The connective tissues include several types of fibrous tissue that vary only in their density and cellularity, as well as the more specialized and recognizable variants bone, ligaments, tendons. Connective tissue lecture location of connective tissue. Adipose tissue defies most criteria for ct, but frequently arises from fibroblasts or adventital cells resembling ct fibroblasts, and adipocytes are invested in.
Connective tissue fillin notes student astephensscience. Loose connective tissue gets its name from the loose connection of fibers that it contains including elastic fibers made of elastin which is an extracellular protein with elastic properties. As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Clinical features focal or segmental lesions of small to medium sized arteries acute necrotising inflammation of the arterial media with fibrinoid necrosis and inflammatory cell infiltrate, resulting in, 1.
The best app for cbse students now provides tissues class 9 notes latest chapter wise notes for quick preparation of cbse exams and school based annual examinations. Connective tissue fibers are of three principal types. The next most abundant substance, protein, is a distant second, constituting only about 18 percent of the total. Here are your notes on the epithelial tissues of human body. Most connective tissues have a nerve supply as does epithelial tissue. Collagen fibers are present in all types of connective tissue but vary greatly in their. If the organ is suspended in the body cavity, this layer is called a tunica serosa and it is covered by a simple squamous epithelium that is called mesothelium. Adipose tissue aka fat, beneath skin, around kidneys and eyeballs, abdominal membranes. A summary of the various kinds of connective tissues is given in figure 1 and table 1. Ppt connective tissue powerpoint presentation free to.
Organs, such as the small intestine, are structurally weaker than tendon because they require connective tissue to provide metabolic and immune support so the connective tissue must contain blood vessels, macrophages, lymphocytes. Connective tissue that provides support and framework for the body consists of fibrous proteins and nonfibrous ground substance in varying proportions depending on their functions 2. Note the extensive lateral interactions that give the structure its mechanical strength. In histological technique a tissue is the bit under study. Connective tissue consists mainly of long fibers embedded in noncellular matter, the ground substance. In animals, the connective tissue is very complex has a vital role.
More than 19 different types of collagens, encoded by 30 widely dispersed genes with characteristic distribution. Chapter 4 connective tissue 57 figure 415a,b dense regular connective tissue, tendon figure 415c clinical correlation. The amount of fat is highly variable, but commonly ranges from 4 to 10. When you examine tissue at a microscopic level, having the ability to detect the presence and location of the four basic tissues enables you to identify the organ that you are looking at. There is a wide range of vascularity among connective. Tissue are groups of cells with a common structure and. Science class 9 notes free download pdf chapter 6 tissues 1. As you examine the slide, note the large, oval shaped. Classification of connective tissue according the amount of cells, fibers and amorphous ground substance. Cbse class 9 science chapter 6 tissues notes in pdf are available for free download in mycbseguide mobile app. Embryonic connective tissues types histological findings specialized cells histological appearance. Framework of an organ, a gland or other structure, usually composed of connective tissue cells.
Matrix forms the main bulk of this tissue, whereas the cells are loosely spaced and less in number. Connective tissue an overview sciencedirect topics. Connective tissue serve as a connecting link for binding, supporting and strengthening all other body tissues together. Connective tissue mucoid connective tissue loose connective tissues areolar connective tissue adipose tissue reticular connective tissue dense connective. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that. Tendinosis figure 416a,b loose connective tissue synopsis 42 functions of connective tissue figure 417a,b loose connective tissue, small intestine figure 417c clinical correlation.
Areolar loose connective tissue isareolar and adipose the most widely distributedconnective tissue connective tissue. Ix biology chapter notes brilliant public school, sitamarhi. Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. Small amounts of connective tissue are found intermingled with other tissues throughout all organs of the body. Structural organisation in animals ncert notes for class 11 biology download in pdf points to remember. Collagen, which is the most abundant protein, constitutes about onethird of all body protein.
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