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Depends on the species. Mammals and birds usually have four. Amphibians and some reptiles have three.

Four. 1.Left Atrium. 2. Right Atrium. 3. Left ventricle. 4. Right ventricle.

There are four chambers in the human heart, a left and right atrium and a left and right ventricle.

There are 4 chambers in a heart.

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Q: How many chambers are there in the heart?
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