The correct answer is D. Vena Cava.
The vena cava is the largest vein in the body. It carries deoxygenated blood from the body to the right atrium of the heart. The pulmonary vein carries oxygenated blood from the lungs to the left atrium of the heart. The pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs. The aorta carries oxygenated blood from the left ventricle of the heart to the rest of the body.
The vena cava is divided into two parts: the superior vena cava and the inferior vena cava. The superior vena cava carries blood from the upper half of the body to the heart, while the inferior vena cava carries blood from the lower half of the body to the heart.
The vena cava is a large, muscular vein that is located in the chest cavity. It is about 10 inches long and 1 inch in diameter. The vena cava is surrounded by a layer of fat and connective tissue.
The vena cava is a very important vein because it carries blood from the body to the heart. If the vena cava is blocked, it can cause a serious condition called heart failure.