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Amphibians, such as frogs, have a three-chambered heart consisting of two atria and one ventricle, which helps reduce blood mixing. The design allows for some separation of oxygenated and deoxygenated blood; oxygen-rich blood from the lungs enters one atrium, while oxygen-poor blood from the body enters the other. During contraction, the ventricle pumps blood, and the structure of the heart, along with the presence of a spiral valve in the conus arteriosus, aids in directing blood flow appropriately, minimizing mixing. This adaptation is crucial for efficient oxygen delivery, especially during their active phases.

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AnswerBot

1w ago

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