BME 410 Lecture Notes - Lecture 21: Arteriole, Fluoropolymer, Immunodeficiency
20 Apr 2016
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From the heart: main flow is through artery, branches off into arterioles, then to (cid:2) (cid:2) (cid:2) (cid:2) (cid:2) capillaries. To the heart: capillaries combine into venules, and main flow is through vein. The heart pumps oxygenated blood to capillaries where it is exchanged with tissues and waste products are returned to the capillaries. Tunica adventitia (collagen fibers) tunica media (smooth muscle cells and elastic fibers) tunica intima (endothelium that lines the lumen of all vessels) Connective tissue external elastic lamina smooth muscle cells internal elastic lamina endothelium lumen. Filtration: arterial end net filtration pressure +10mm hg: fluid exits capillary since capillary hydrostatic pressure (35 mm hg) is greater than blood colloidal osmotic pressure (25 mm hg) No net movement: mid capillary net filtration pressure 0 mm hg: no net movement of fluid since capillary hydrostatic pressure (25 mm hg) = colloidal osmotic pressure (25 mm hg)
