Frontiers of Biomedical Engineering (BENG 100) Professor Saltzman discusses the biophysics of the circulatory system. He begins by describing the anatomy of different types of blood vessels, and states the relationship between pressure difference (?P) as the driving force for fluid flow (Q) in a tube (ie, blood vessel) with some resistance R (?P = RQ). R can be calculated using if dimensions of the tube (L, r) and fluid viscosity (?) are known: R = 8?L/?r4
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