KINE 1P90 Lecture Notes - Lecture 8: Tunica Externa, Tunica Media, Lymphatic Vessel

• School: Brock University
• Department: Physical Education and Kinesiology
• Course: KINE 1P90
• Professor: Panagiota Klentrou

Document Summary

The blood vessels (arteries, arterioles, capillaries, venules, and veins) form a from the heart, to closed the cells, and back again. Arteries and arterioles tube that carries blood away. Arteries are strong, elastic vessels adapted for carrying high-pressure blood: arteries become smaller as they divide and give rise to. The wall of an artery consists of an endothelium, tunica media (smooth muscle), and tunica externa (connective tissue). Arteries are capable of vasoconstriction as directed by the sympathetic impulses; when impulses are inhibited, vasodilation results. arterioles. 2: capillaries are the smallest vessels, consisting only of a layer of endothelium through which substances are exchanged. Capillary permeability varies from one tissue to the next, generally with more permeability in the liver, intestines, and certain glands, and less in muscle and considerably less in the brain (blood-brain barrier). The pattern of capillary density also varies from one body part to the next. a.