THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The superior vena cava and inferior vena cava are very large veins that bring deoxygenated blood to your heart to get oxygen.

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.

Detailed explanation-3: -Valves in the veins keep blood flowing in the correct direction. Two large veins that lead into the heart are the superior vena cava and inferior vena cava.

Detailed explanation-4: -The inferior and superior vena cava bring oxygen-poor blood from the body into the right atrium. The pulmonary artery carries oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream.