ANATOMY

Detailed explanation-1: -Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your diaphragm). Your superior vena cava, your second biggest vein, brings oxygen-poor blood from your upper body to your heart. Think of it like a bus line.

Detailed explanation-2: -The superior vena cava receives deoxygenated blood from all parts of the upper body, while the inferior vena cava receives the venous return from the lower body (including the abdomen). These two large veins both drain into the right atrium of the heart.

Detailed explanation-3: -The blood vessels include the superior and inferior vena cava. These bring blood from the body to the right atrium. Next is the pulmonary artery that carries blood from the right ventricle to the lungs. The aorta is the body’s largest artery.