BIPN 100 Lecture Notes - Lecture 14: Heart Valve, Cardiac Output, Viscosity
11 Apr 2017
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Flow (q) = pressure force/resistance o o. If pressure gradient is 0 then there is no flow. Larger radius=more flow: if radius doubles, 16x more flow longer length= less flow. Where most of regulation of blood pressure occurs. Velocity is dependent on flow rate (q) and cross sectional area (a: v=q/a, the narrower the vessel, the faster the velocity of flow. Pressure, volume, flow, and resistance: velocity of blood flow depends on the total cross sectional area, highest total cross sectional area in capillaries (slowest velocity, lowest total cross sectional area in aorta (highest velocity) *pressure oscillates because it increases and decreases with every heart beat. Blood flow through the lungs equals the amount of blood through the systemic loop: must push 100% through. Incoming: veins, outgoing: artery all blood vessels enter and exit from the top of the heart, on the botto of the heart there is only muscle. Left side: incoming: pulmonary vein (oxygenated), outgoing: aorta (oxygenated)
