Which is the largest artery in the body?

• A. Carotid.
• B. Median.
• C. Cerebral.
• D. Aorta.

Answer: (D)

The main idea is size and function: the aorta is the body's largest artery. It carries blood directly from the left ventricle into the systemic circulation, and its diameter and cross‑sectional area exceed those of all other arteries. That wide channel helps move a large volume of blood with each heartbeat and withstands the high pressure of blood pumped from the heart. The aorta starts at the heart, ascends briefly, arches, and then descends through the chest and abdomen, giving off major branches to supply the head, arms, and trunk. While the carotid arteries are important for delivering blood to the brain and are sizable, they are much smaller than the aorta. Cerebral arteries are even smaller branches supplying the brain. There isn’t a single primary artery called the median artery in the adult circulatory system. So the aorta is the correct answer.