Organ system is the answer according to me if it is one word question
Answer:
During cellular respiration, <em>glucose</em> and oxygen are converted into carbon dioxide and water.
Explanation:
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation. Arteries and veins are two of the body's main type of blood vessels.