The principal artery, also known as the AORTA, is the largest artery in the human body. It is responsible for carrying oxygen-rich blood from the heart to the rest of the body. The AORTA is divided into two sections: the ascending AORTA and the descending AORTA. The ascending AORTA carries oxygenated blood from the left ventricle of the heart to the arch of the AORTA, while the descending AORTA carries oxygenated blood from the arch of the AORTA to the abdomen and legs. The AORTA is an essential part of the cardiovascular system and is vital for the proper functioning of the body.