Question

which vessels return blood to the heart?
currently selected: d
a capillaries
b arterioles
c arteries
d veins

Explanation:

To determine which vessels return blood to the heart, we analyze each option:

• Option A: Capillaries are where gas and nutrient exchange occurs between blood and tissues, not for returning blood to the heart.
• Option B: Arterioles are small branches of arteries that carry blood away from the heart to capillaries, so they don't return blood to the heart.
• Option C: Arteries carry blood away from the heart to the body's tissues and organs.
• Option D: Veins are the blood vessels responsible for carrying blood back to the heart from the body's tissues.

Answer:

D. veins