Multiple choice

In regards to blood circulation, where does the exchange of nutrients take place?

  1. veins

  2. arteries

  3. capillaries

  4. pulmonary

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Capillaries are the smallest blood vessels where the exchange of oxygen, nutrients, and waste products occurs between the blood and surrounding tissues. Arteries carry blood away from the heart, and veins return it.