Multiple choice

Which of the following organisms does not possess a four chambered heart?

  1. Ostrich

  2. Toad

  3. Kangaroo

  4. Bat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Four-chambered hearts (two atria, two ventricles) completely separate oxygenated and deoxygenated blood, allowing for efficient oxygen delivery. This is found in birds and mammals. Toads are amphibians and possess three-chambered hearts (two atria, one ventricle), where some mixing of oxygenated and deoxygenated blood occurs. Ostrich (bird), kangaroo (mammal), and bat (mammal) all have four-chambered hearts.

Keep practicing — related questions