KINE 2031 Lecture Notes - Lecture 25: Ulna, Blood Sugar, Trachea
5 Dec 2016
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Document Summary
Helps define the movements of the limbs in their default positions, makes it easier to define planes, and bones like the ulna and radius do not cross over. Epithelial tissue: covers a body surface or lines a body cavity, forms parts of most glands, Functions: protection, absorption, filtration, ion transport, excretion, secretion, forms slippery surfaces. Cellularity: composed almost entirely of cells with minimal extracellular material. Polarity: cell regions of the apical surface differ from the basal surface. Avascular but innervated: epithelia receive nutrients from underlying connective tissue. Regeneration: lost cells are quickly replaced by cell division. Many kinds of epithelia exist in the body. To classify them, each epithelium is given two names. The first name indices the number of cell layers in the epithelium, and the last name describes the shape of the cells. First name of tissue indicates number of cell layers: Last name of tissue describes shape of cells: Squamous: cells are wider than tall; flat.
