Multiple choice

Heart of crocodile is ____________.

  1. single chambered

  2. two chambered

  3. three chambered

  4. four chambered
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crocodilians are unique among reptiles in having a four-chambered heart (two atria, two ventricles), similar to birds and mammals. This prevents mixing of oxygenated and deoxygenated blood, supporting their active predatory lifestyle. Most reptiles have three-chambered hearts.

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