How many chambers are there in a bird's heart?
- Correct Answer: 4
- 5
- 1
- 3
Explanation: Birds have a relatively large, four-chambered heart. The heart beats rapidly to keep oxygenated blood flowing to muscles and other tissues. Hummingbirds have the fastest heart rate at up to 1,200 times per minute. That’s almost 20 times faster than the human resting heart rate!.
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