Question

multiple choice question
the smallest veins are the ______.
o venous sinuses
o venules
o portal veins

Explanation:

In the circulatory system, venules are the smallest veins. They receive blood from capillaries and gradually merge to form larger veins. Venous sinuses are larger, dilated channels. Portal veins are larger - sized veins that carry blood to a second set of capillaries.

Answer:

B. venules