Oxygen
Step-by-step explanation:
The correct pathway of oxygen as it travels from the lungs and goes to the cells of the body is: lungs, bronchioles, alveoli, capillaries, cells
Respiration begins at the nose or mouth, where oxygenated air is brought in before moving down the pharynx, larynx, and the trachea
The trachea branches into two bronchi, each leading into a lung
Each bronchus divides into smaller bronchi, and again into even smaller tubes called bronchioles, at the end of the bronchioles are air sacs called alveoli, and this is where gas exchange occurs