Question

multiple choice question
which of these is the smallest type of vein?

venous sinuses
medium veins
postcapillary venules
muscular venules
large veins

Explanation:

To determine the smallest type of vein, we analyze the options: Venous sinuses are large, medium veins are mid - sized, large veins are big. Among venules, postcapillary venules are the first (and smallest) venules that receive blood from capillaries, while muscular venules are larger than postcapillary venules. So postcapillary venules are the smallest.

Answer:

C. Postcapillary venules