Physiology 2130 Lecture Notes - Lecture 4: Pressure Gradient, Blood Vessel, Arteriole
23 Dec 2015
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Document Summary
Arteries have to have certain features to handle huge gushes of blood o. The resistance gives us a very large blood pressure drop in the arterioles. Blood pressure is very low in venous side of circulation. Valves ensure even though blood pressure is very low blood gets back to the. Don"t need valves in the arteriole side o. Need valves in the venous side because we have low blood pressure heart. However the pressure gradient causes blood to flow through the. The heart establishes the high pressure at one end o. The pressure gradient drives the blood through the vessels. If you add resistance in the middle (the arterioles) it creates a kink in the circulatory system pressure system. The pressure change (or pressure gradient) in the circulatory system drives blood through vessels pressure gradient. Blood flows down from high pressure (p1) to low pressure (p2) down a. Blood flow is decreased by resistance encountered by the blood.
