Comparative Organ System Anatomy · Zoology

In reptiles, the heart is typically:

  1. A simple, undivided two-chambered heart
  2. Three-chambered, incompletely divided
  3. Fully four-chambered, as in the mammals
  4. A single, entirely undivided chamber
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Correct answer: Three-chambered, incompletely divided

Most reptiles have a three-chambered heart with partial separation of ventricles. Crocodilians are an exception with four chambers.

Difficulty: Medium Question 6 of 20

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