BIOL 1119 Lecture Notes - Lecture 8: Mean Arterial Pressure, Hemorheology, Brachial Artery
3 Oct 2017
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Document Summary
Principles of blood flow: blood flow: amount of blood flowing through a tissue in a given time (ml/min, velocity: distance traveled by blood per unit time (cm/min) Physical principles of blood flow based on pressure and resistance: f p/r (f = flow, p = difference in pressure, r = resistance to flow) Pressure driving blood into the tissues averaged over the entire cardiac cycle. It is not the arithmetic average of systolic and diastolic pressures bc low diastolic pressure lasts longer than systolic one. Good estimate of systemic blood pressure because it is similar throughout body except for effect of gravity, which causes a lower. Map in the head than in the legs. Map is generally considered similar in all large arteries. Consequences: can weaken small arteries and cause aneurysms, promotes, hypotension development of atherosclerosis. Prevent excessive blood pressure by ability of the large, elastic/conducting arteries to stretch and recoil during the cardiac cycle.
