Multiple choice

Which is NOT true about the human heart?

  1. The right side is deoxygenated

  2. It has four chambers

  3. valves keep blood flowing in the right direction

  4. It is made of smooth muscle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The heart is composed of cardiac muscle, not smooth muscle. Smooth muscle is found in organs like the stomach and blood vessels.

Keep practicing — related questions