ANATOMY

Detailed explanation-1: -Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.

Detailed explanation-2: -Deoxygenated blood from the lower half of the body enters the heart from the inferior vena cava while deoxygenated blood from the upper body is delivered to the heart via the superior vena cava. Both the superior vena cava and inferior vena cava empty blood into the right atrium.

Detailed explanation-3: -Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.

Detailed explanation-4: -Venous blood is another name for deoxygenated blood. The pulmonary artery transports deoxygenated blood. The pulmonary artery carries deoxygenated blood from the heart to the lungs.