AP BIOLOGY

Detailed explanation-1: -Pulmonary circulation is the system of transportation that shunts de-oxygenated blood from the heart to the lungs to be re-saturated with oxygen before being dispersed into the systemic circulation.

Detailed explanation-2: -Pulmonary circulation transports oxygen-poor blood from the right ventricle to the lungs, where blood picks up a new blood supply. Then it returns the oxygen-rich blood to the left atrium.

Detailed explanation-3: -Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body’s tissues through the aorta.

Detailed explanation-4: -Answer and Explanation: The correct answer is E. The pulmonary pathway flows from the right ventricle through the pulmonary trunk to the lungs to pick up oxygenated blood. The oxygenated blood returns to the left atrium.