The flow rate of blood is the same in all segments of the vascular tree, but the velocity of blood flow is slower in the capillaries than in other segments of the vascular tree.

Question

Quizplus · Accepted Answer

The flow rate of blood (volume of blood passing through a vessel per unit time) must be the same throughout the vascular tree to maintain continuity of blood flow. However, the velocity of blood flow (distance traveled by blood per unit time) is slower in the capillaries due to the large cross-sectional area of the capillary network and to allow efficient gas and nutrient exchange between blood and tissues.

The Flow Rate of Blood Is the Same in All