PHYSL212 Lecture Notes - Lecture 29: Pulmonary Circulation, Circulatory System, Capillary
4 Dec 2016
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Physl 212 - lecture #29 - further details of the cardiovascular system. Factors that determine blood pressure (pressure) gradients across the circuits (need to know this + picture: **site of greatest p drop is also the site of the greatest resistance. This occurs in the arterioles (where (cid:1371) p = (cid:1371)r: the amount of blood flow between the systemic and pulmonary is the same (5. L/min) even though mapsystemic > mappulmonary (physical property) High amounts of resistance in systemic circuit. Because resistance is so high, then based on f = p/r, pressure must be also very high! Can have acute differences what comes it what goes out. In a closed system: what comes in, must go out: the pressure drops from systemic (cid:1372) pulmonary. If you decrease r just a bit, then there will be a huge increase in resistance (and blood flow) Based on poiseuille"s law, why is left ventricle more muscular: due to the length.
