ZOO 3713C Lecture Notes - Lecture 7: Pericardium, Serous Fluid, Thyroid
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Document Summary
Tissues are collection of structurally similar cells with related function. There are four basic tissues in the body: Epithelia are sheets of cells that cover body surfaces and cavities. Glands are also covered internally by epithelial cells, which function in secretion of their products. Epithelial cells are classified according to their shape into: They are further classified by number of cell layers into: 1- simple (only one layer), 2- stratified (multiple layers) The stratified epithelia are named according to the shape of the apical cells. Kidney corpuscles, air sacs of lungs, lining of heart . Glands are one or more cells specialized to secret a product (mostly proteins) by exocytosis. Glands are classified as exocrine (external secretion) or endocrine (internal secretion), depending on where they release their products and as unicellular or multicellular on the basis of their cell number.
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periostesis mastication cartilage |
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small sacs containingsynovial fluid semilunar cartilagepads tendon sheaths |
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