Final answer:
The pharynx, especially the oropharynx, serves as the passageway for air, food, and water in the body.
Step-by-step explanation:
The part of the body that contains a passageway for air, food, and water is the pharynx. In particular, the oropharynx portion of the pharynx is flanked by the nasopharynx, oral cavity, and laryngopharynx and serves as a passageway for both air and food. swallows, a flap called the epiglottis closes over the opening to the larynx, ensuring food does not enter the respiratory tract.