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10skim 10skim
wrote...
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12 years ago
I was wondering where the blood pressure is the lowest in the circulatory system, would it be the pulmonary artery, veins, capillaries? also where would blood velocity be the lowest? thanks!
on an aamc test (old MCAT) it said that veins have lower BP then capillaries...
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wrote...
#1
12 years ago
Lowest blood pressure is at VEIN where deoxygenated blood flow through. While ARTERY contains oxygenated blood where high blood pressure needed for fast oxygen transportation.
wrote...
#2
12 years ago
Blood pressure is lowest in veins. (see attached article for details)
Venous blood pressure is defined as pressure in veins or in atria. Mean pressure in Rt. atrium is 5 mm & left atrium is about 8 mm of Hg.
The velocity of blood flow varies inversely with total cross-sectional area of a vessel. Thus, it is minimum in capillaries allowing time for exchange of gases & nutrients.
All the best for your exams.
007
wrote...
#3
12 years ago
Capillaries. The cross sectional area of capillaries (if you take into account that there are many) is much higher than larger veins and areas. If you consider that flow rate = Av, then the velocity is very low in the capillaries
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