Multiple choice

In which of the following vertebrate group or groups, heart does not pump oxygenated blood to different parts of the body?

  1. Pisces and amphibians

  2. Amphibians and reptiles

  3. Amphibians only

  4. Pisces only

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

Fish have a closed-loop circulatory system. The heart pumps the blood in a single loop throughout the body.