CONNECTIVE TISSUE

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CONNECTIVE TISSUE DEFINITION

 Connective tissue, group of tissues in the body that maintain the form of the body and its organs and provide cohesion and internal support. 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, cartilage, and adipose(fat) tissue.





Randomly oriented collagenous fibres of varying size in a thin spread of loose areolar connective tissue (magnified about 370 ×).

COMPONENTS OF CONNECTIVE TISSUE
All forms of connective tissue are composed of (1) extracellular fibres, an amorphous matrix called ground substance, and  stationary and migrating cells. The proportions of these components vary from one part of the body to another depending on the local structural requirements. In some areas, the connective tissue is loosely organized and highly cellular; in others, its fibrous components predominate; and in still others, the ground substance may be its most conspicuous feature. The anatomical classification of the various types of connective tissue is based largely upon the relative abundance and arrangement of these components.





 TYPES OF CONNECTIVE TISSUE

Cartilage

Imagen relacionadaCartilage is a type of supporting connective tissue. Cartilage is a dense connective tissue, consisting of the chondrocyte cells. Cartilage connective tissue includes hyaline cartilage, fibrocartilage and elastic cartilage. The fibers in the cartilage connective tissue include collagen and elastic fibers. Cartilage connective tissue has limited ground substance and can range from semisolid to a flexible matrix.

Bone

Imagen relacionadaBone is another type of supporting connective tissue. Bone, also referred to as osseous tissue, can either be compact (dense) or spongy (cancellous), and contains the osteoblasts or osteocytes cells. Bone connective tissue is made up of collagen fibers and has rigid, calcified ground substance.

Adipose

Resultado de imagen de CONNECTIVE ADIPOSE TISSUEAdipose is another type of supporting connective tissue that provides cushions and stores excess energy and fat. It contains reticular cells and is made up of reticular fibers. The extracellular substance of adipose connective tissue is made up of a tight pack of cells with a small amount of gelatinous ground substance.

Blood

Imagen relacionadaBlood, also referred to as vascular tissue, is a type of fluid connective tissue. Blood connective tissue contains three types of cells including erythrocytes, leukocytes, and thrombocytes. The fibers found in blood connective tissue are soluble proteins that form during clotting and the extracellular substance making up blood connective tissue is the liquid blood plasma.

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