Arteries are blood vessels that carry blood away from the heart.
Explanation: The primary function of arteries is to transport oxygen-rich blood from the heart to various tissues and organs throughout the body. There are many arteries in the circulatory system, and while most carry oxygenated blood, it is important to note that the pulmonary artery is an exception as it carries deoxygenated blood from the heart to the lungs. However, in general, the defining characteristic of arteries is that they are responsible for carrying blood away from the heart, making the correct statement that all arteries carry blood away from the heart.