THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -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-2: -The inferior vena cava is ultimately responsible for the transport of almost all venous blood (deoxygenated) from the abdomen and lower extremities back to the right side of the heart for oxygenation.

Detailed explanation-3: -Oxygen-poor blood from the body enters your heart through two large veins called the superior and inferior vena cava. The blood enters the heart’s right atrium and is pumped to your right ventricle, which in turn pumps the blood to your lungs.

Detailed explanation-4: -The superior and inferior vena cava are both large veins of the body, responsible for returning deoxygenated blood back to the heart at the point of the right atrium. The superior vena cava collects blood from aspects of the body above the diaphragm, while the inferior vena cava collects blood from below the diaphragm.