Which structure is used by both the digestive and respiratory systems? nasal cavity pharynx bronchi alveoli none of the above

The correct answer is **pharynx**.<br /><br />The pharynx (throat) is a passageway for both air and food. Air travels from the nasal cavity through the pharynx to the larynx and then to the trachea and lungs. Food travels from the mouth through the pharynx to the esophagus and then to the stomach. The other structures listed are exclusive to either the respiratory or digestive system.<br />