Question

Fish and birds have closed circulation. They both have a systemic circulatory system, which delivers blood from the heart and out to the organs of the body. Birds differ from fish in that they have a circuit that leads through the lungs and back to the heart. What is this called?

a) Pulmonary circuit

b) Lymphatic system

c) Hepatic portal system

d) Renal circuit

Answer 1

Birds have a pulmonary circuit that leads through the lungs and back to the heart.

Step-by-step explanation:

Birds have a circuit that leads through the lungs and back to the heart, which is called the pulmonary circuit.