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Proceeding downstream from the aorta, branching of arterial vessels increases

total cross-sectional area and thus results in diminished velocity of blood flow

from the aorta to the capillaries. Velocity increases from the capillaries to the

large veins with the confluence of vessels and the resulting decrease in total

cross-sectional area.

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Q: What is the relationship between cross sectional area of blood vessel and velocity of blood flow in that vessel?
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