Question Detail
Question
3. Birds have how many heart chambers, supporting their high metabolic rate?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Birds have a four-chambered heart (two atria and two ventricles), which completely separates oxygenated and deoxygenated blood to support their endothermic, high-energy metabolism.
Hint
Birds share the same number of heart chambers as mammals.