Multiple choice

Which path correctly shows how oxygen moves from the lungs to the body's cells?

  1. systemic circulation to the heart to pulmonary circulation

  2. pulmonary circulation to the heart to systemic circulation

  3. pulmonary circulation to systemic circulation to the heart

  4. the heart to pulmonary circulation to systemic circulation

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

Oxygenated blood leaves the lungs via pulmonary circulation to the heart, which then pumps it through systemic circulation to reach the rest of the body's cells.