BIOB32H3 Lecture Notes - Peristalsis, Ultimate Tensile Strength, Mesothelium
28 Mar 2013
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Document Summary
Tissues: groups of cells similar in structure and function, the four types of tissues. Classification of epithelia: simple or stratified, squamous, cuboidal, or columnar. Epithelia: simple cuboidal: single layer of cubelike cells with large, spherical central nuclei, function in secretion and absorption, present in kidney tubules, ducts and secretory portions of small glands, and ovary surface. Epithelia: stratified columnar: several cell layers with cuboidal basal cells and columnar superficial cells, functions in protection and secretion, present in large ducts of some glands, and in portions of the male urethra. Epithelia: transitional: several cell layers, basal cells are cuboidal, surface cells are dome shaped, stretches to permit the distension of the urinary bladder, lines the urinary bladder, ureters, and part of the urethra. Glandular epithelia: a gland is one or more cells that makes and secretes an aqueous fluid, classified by, site of product release endocrine or exocrine, relative number of cells forming the gland unicellular or multicellular.
