Multiple choice

Oxygen rich blood from the lungs first enters _______ of heart.

  1. left atrium

  2. left ventricle

  3. right atrium

  4. right ventricle

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

Oxygenated blood returns from the lungs via the pulmonary veins. It first enters the left atrium before being pumped into the left ventricle and then to the rest of the body.