Exchange of oxygen, nutrients, and waste materials takes place across the walls of small blood vessels called ____.

Question

Exchange of oxygen, nutrients, and waste materials takes place across the walls of small blood vessels called ____. ​

Quizplus · Accepted Answer

Capillaries are the smallest blood vessels and the site of exchange of oxygen, nutrients, and waste materials between the blood and tissues. Ducts are tube-like structures that carry fluids, such as saliva, milk, or bile. Venules are small blood vessels that drain blood from capillaries and into veins. Arterioles are small branches of arteries that lead to capillaries.

Exchange of Oxygen, Nutrients, and Waste Materials Takes Place Across