The aorta is the largest artery in the human body, responsible for carrying oxygen-rich blood from the heart to the rest of the body. It originates from the left ventricle of the heart and arches upward before descending through the chest and abdomen. The aorta branches into smaller arteries that supply blood to various organs and tissues. The aorta has several sections, including the ascending aorta, aortic arch, and descending aorta. It plays a crucial role in the circulatory system, ensuring that all parts of the body receive the oxygen and nutrients needed for proper function.