Which vertebrates heart doesn't pump oxygenated blood?
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pisces have 2 chambered heart so the deoxigenated blood passe through the gills to the whole body
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Pisces only.
In pisces the oxygenated blood is directly sent to all parts of the body. Then the deoxygenated blood is sent to the heart and the heart pumps the blood to the gills for oxygenation.
In pisces the oxygenated blood is directly sent to all parts of the body. Then the deoxygenated blood is sent to the heart and the heart pumps the blood to the gills for oxygenation.
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