In amphibians,the heart is:

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(D) The amphibian heart is three-chambered,consisting of two auricles and one ventricle.It receives oxygenated (arterial) blood from the lungs/skin in

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With arterial and venous circulation

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(D) The amphibian heart is three-chambered,consisting of two auricles and one ventricle.It receives oxygenated (arterial) blood from the lungs/skin into the left auricle and deoxygenated (venous) blood from the rest of the body into the right auricle.Both types of blood mix in the single ventricle before being pumped out.Therefore,the heart handles both arterial and venous blood circulation.

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