The structure that carries blood away from the heart is known as an artery. Arteries are crucial components of the circulatory system, as they transport oxygen-rich blood from the heart to various tissues and organs throughout the body. The largest artery, the aorta, emerges from the heart's left ventricle and branches into smaller arteries that further distribute blood. Arteries have thick, elastic walls that help maintain blood pressure and manage the flow of blood. Unlike veins, which carry blood back to the heart, arteries play a vital role in delivering nutrients and oxygen necessary for sustaining life.