In which of the following groups of animals, the heart pumps only deoxygenated blood?

Fish

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Reptile

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Birds

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Amphibians

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Solution

The correct option is A Fish
The fish heart contains and pumps only deoxygenated blood since the blood does not return to the heart after being oxygenated from the gills. Instead, it is supplied to the different parts of the body directly.
So, the correct answer is option A.

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................. side of the heart pumps only deoxygenated blood.

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