PHGY 214 Lecture Notes - Lecture 2: Monocyte, Capillary Action, Aorta
24 Jan 2017
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Document Summary
Arteries act as a pressure reservoir to provide the driving force for blood when the heart is relaxing. This is due to the elastic nature of the arteriole wall. Arteries act as pressure reservoir during ventricular contraction. How elastic recoil play a role in the contraction: graph the pressure changes across the vascular tree. Left ventricle, goes from 120 -> 0 during systolic and diastolic. Large arteries systolic 120 and diastolic 80. The pressure decreases as it goes through arterioles due to the large surface area. The pressure goes to 0 around the venules and veins: describe the systolic and diastolic pressures and the concept of mean arterial pressure. Bp is the force exerted by blood against the vessel wall. The force exerted by blood against a vessel wall depends on. Very important for the storage of the artery: systolic pressure (sp) Peak pressure exerted by ejected blood against vessel walls during cardiac systole. Averages 120 mm hg: diastolic pressure.
