Which of the following is the correct sequence of blood flow in birds and mammals? a. vena cava → right atrium → right ventricle → pulmonary vein. b. vena cava → left atrium → left ventricle → pulmonary artery. c. left ventricle → aorta → lungs → systemic circulation. d. vena cava → right atrium → right ventricle → pulmonary artery

D. vena cava → right atrium → right ventricle → pulmonary artery

Explanation:

This is an example of pulmonary circuit.

Venae cavae are a vessels (vena cava interior and superior) that carriy deoxygenated blood from the body to the  right atrium. From the right atrium through the tricuspid valve the blood goes into the right ventricle. Then, from the right ventricle through the pulmonary valve the blood goes into the main pulmonary artery which carries deoxygenated blood to the lungs (to recieve oxygen).

i wish i could with all of them i can barley see the first one so here's the answer to the first one b