Answer:
Blood enters the right atrium via the superior and inferior vena cava, flows to the right ventricle and then into the lungs, returns from the lungs to the left atrium and left ventricle, and exits out the aorta
Explanation:
The blood stream will flow to the right artium through the vena cava and moves to the right ventricle as well as the lungs. The blood is then returned back to the left atrium and ventricle from the lungs. It later flows out through the aorta. That is the sequence of flow of the blood streams to and from the lungs.