# What is the relationship between cross sectional area of a blood vessel

### cross-sectional area of blood vessels. - The Student Room

Flow rate is the product of velocity(speed) of the blood and the cross sectional surface area of the artery/capillary/vein it is flowing through. The rate of movement of blood through vessels depends on both the pressure exerted on the blood and the diameter of the blood vessel. These two factors are . Hence, the cross sectional area of a blood vessel is equal to the area in vessel calibre is met with a subsequent change in the blood velocity.

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