Schematic diagram of a muscular artery. The cellular and extracellular components are labeled. Note the locations of external and internal elastic membranes. In certain locations, the muscle cells in the tu nica media are shown in contact to represent the presence of gap junctions between cells. f„ tunica. (Based on Rhodin JAG. Handbook of Physiology. New York: Oxford University Press, 1980.)
external . elastic membrane collageih vfi'
ui.. \ smooth muscle cells t. media t. intima
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