Emmitt Gioia
Emmitt Gioia voted up AnnNettie Paradise's answer

I read that when blood leaves the capillaries, it enters tiny veins called venules. Between 8 and 100 micrometers in diameter, venules join to form veins that return blood to the heart. When blood reaches the veins, it has lost nearly all its pressure, so venous walls are thinner than arterial walls. They also have … Read more