PSL301H1 Chapter Notes -Tricuspid Valve, Pulmonary Vein, Endoplasmic Reticulum
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PSL301H1 Full Course Notes
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Document Summary
Cardiovascular system (463-479: pressure, volume, & resistance, blood flows down a pressure gradient ( p), from region of high pressure(heart) to low (blood vessels) Highest pressure are aorta and systemic arteries, receiving blood from left ventricle. Lowest pressure is in venae cavae, before emptying into right atrium: pressure of fluid in motion decreases over distance. Hydrostatic pressure is exerted equally in all directions. In a moving fluid system, pressure falls over distance as energy is lost due to friction. Dynamic, flowing: potential energy (hydrostatic pressure) Most fluid in cardiovascular system: pressure changes in liquids without a change in volume. Flow p: the higher the pressure gradient, the greater the flow, resistance opposes flow. Tendency of cardiovascular system to oppose blood flow is resistance to flow: flow 1/r, increase in resistance results in decrease in flow. Influenced by radius of the tube (r), length of the tube (l), viscosity of the fluid ( : r=l /r4.
