How many circulatory systems do amphibians have?

Amphibians, or Amphibians, are organisms that live partly in water. Since they came out on land, their structure has become more complex. Amphibians have a three-chambered heart and two circles of blood circulation. The second circle of blood circulation is necessary for the transfer of oxygen from the lungs, which perform the respiratory function. It is filled with arterial blood. In the heart, arterial and venous blood mix. It turns out mixed blood, which in a large circle supplies all the other organs of the amphibians.



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