BIOC21H3 Lecture Notes - Lecture 7: Tunica Intima, Pulmonary Vein, Coronary Circulation
21 Apr 2012
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Document Summary
A closed circuit (mostly) where you have blood flowing by the heart into arteries, passing through capillaries. Blood vascular system: pulmonary circulation-capillaries pump blood to lungs, coronary circulation-pump blood to heart (lots of capillaries in cardiac myocytes, systemic circulation-through system; come back through vena cava. Blood vessels is the pathway to which blood, oxygen, nutrients, and waste collect. Helps maintain temperature (muscles generate heat = released into vascular system = blood travels to surface of skin = to remove as much heat as possible = to cool down core = thermoregulation) Structure of blood vessels : artery, vein, capillary depends on what it has to deal with. So need to be able to deal with constant change of pressure; arteries can smooth pressure out because arteries get thinner (so want lower pressure to prevent rupturing; want a constant stream rather than on/off flow)
