Which are the small veins that collect blood from capillary networks?

• A. Capillaries
• B. Veins
• C. Venules
• D. Arterioles

Answer: (C)

When blood leaves capillary networks, it flows into the smallest veins, called venules. Venules collect blood from the capillaries and then feed into larger veins as part of the venous return to the heart. Capillaries are the sites of exchange, where nutrients, gases, and wastes move between blood and tissues. Arterioles are small arteries that supply blood to the capillaries, and veins are the larger vessels that carry blood back toward the heart. The venules’ role as the collection point from capillaries makes them the correct choice.