Multiple choice

Heart is completely four chambered in _______.

  1. amphibians

  2. reptiles

  3. birds

  4. fishes

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

Birds and mammals have a completely four-chambered heart, which prevents the mixing of oxygenated and deoxygenated blood. Most reptiles have a three-chambered heart with a partial septum (except crocodiles), while amphibians have three chambers and fishes have two. This complete separation allows for a more efficient supply of oxygen to tissues.

Keep practicing — related questions