Blood flow is slowest in the
A)aorta.
B)capillaries.
C)venules.
D)arterioles.

Question

Quizplus · Accepted Answer

Capillaries have the slowest blood flow because they have the smallest diameter, allowing for only one red blood cell to pass through at a time, and the highest total cross-sectional area, causing blood to slow down as it moves through them. On the other hand, the aorta, arterioles, and venules have faster blood flow due to their larger diameter and lower total cross-sectional area.

Blood Flow Is Slowest in the