PHGY 210 Chapter Notes - Chapter 12.1-12.4: Chordae Tendineae, Pulmonary Artery, Pulmonary Vein

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Rbcs: total body water: plasma is 7%, interstitial fluid 25% and intracellular is 67% 12. 2 pressure, flow and resistance: hemodynamics: blood pressure, blood flow and resistance to blood flow, f (flow) = dp / r, factors affecting resistance include blood viscosity, length and radius of blood vessel. Protective fibrous sac enveloping the heart: fluid filling space between pericardium and epicardium, lubricates. Wall of the heart, made of cardiac muscle cells. Thin layer endothelial cells lining inner surface of heart and blood vessels. Muscular wall separating the right and left ventricles. One-way valve between atrium and ventricle in each half of heart: right av valve = tricuspid, has 3 fibrous flaps/cusps, left av valve = bicuspid, aka mitral valve. In contact with muscle cells via gap junctions. Blood supply: myocardial cells receive blood supply via coronary arteries branching from aorta, coronary blood flow; typical arteries --> arterioles --> capillaries --> venules --

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