The major artery that supplies all other arteries with blood is the:

The major artery that supplies all other arteries with blood is the:

• A. Carotid artery
• B. Pulmonary artery
• C. Femoral artery
• D. Aorta

Answer: (D)

In systemic circulation, all arterial blood ultimately comes from the aorta. It leaves the heart (from the left ventricle) as the main conduit, then branches into arteries that supply every region of the body. The aorta’s branches feed into the carotid arteries for the head, the femoral arteries for the legs, and countless other vessels, distributing oxygen-rich blood throughout the body. The pulmonary artery is part of the pulmonary circulation, carrying blood to the lungs, not to the rest of the body. The carotid and femoral arteries are important regional arteries, but they are branches of the aorta and do not serve as the primary source for all systemic arteries. That's why the aorta is the best answer.

In systemic circulation, all arterial blood ultimately comes from the aorta. It leaves the heart (from the left ventricle) as the main conduit, then branches into arteries that supply every region of the body. The aorta’s branches feed into the carotid arteries for the head, the femoral arteries for the legs, and countless other vessels, distributing oxygen-rich blood throughout the body.

The pulmonary artery is part of the pulmonary circulation, carrying blood to the lungs, not to the rest of the body. The carotid and femoral arteries are important regional arteries, but they are branches of the aorta and do not serve as the primary source for all systemic arteries. That's why the aorta is the best answer.