KAAP220 Chapter Notes - Fall 2018 Chapter 4 - Extracellular fluid, Synovial membrane, Synovial fluid
21 Sep 2018
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Apical surface: faces the exterior of the body or some internal space. Polarity: refers to the presence of structural and functional differences between the exposed and attached surfaces. Simple cuboidal epithelium: provides limited protection and occurs where secretion or absorption takes place. Stratified cuboidal epithelia: relatively rare; located along the ducts of sweat glands and in the larger ducts of mammary glands. Absorb substances and protect the body from digestive chemicals. Simple columnar epithelium: found where absorption or secretion takes place. Pseudostratified columnar epithelium: includes several types of cells with varying shapes and functions. Stratified columnar epithelia: not widely distributed in the body, two or more layers. Tight junctions: form a barrier that isolates basolateral surfaces and deeper tissues from the contents of the lumen. Adhesion belt: locks together the terminal webs of neighboring cells. Gap junctions: permit chemical communication that coordinates the activities of adjacent cells. Desmosomes: provide firm attachment between neighboring cells by interlocking their cytoskeletons.
