Final answer:
The structures labeled on the midsagittal section of the pharynx and upper airway are the laryngopharynx, uvula, epiglottis, and esophagus.
Step-by-step explanation:
The structures labeled on the midsagittal section of the pharynx and upper airway are as follows:
- Laryngopharynx: Located at the bottom of the pharynx, it is the part of the pharynx that connects to the esophagus.
- Uvula: A small, fleshy projection at the back of the throat that helps prevent food and liquid from entering the nasal cavity during swallowing.
- Epiglottis: A cartilaginous flap that covers the glottis during swallowing, preventing food and liquid from entering the trachea.
- Esophagus: A muscular tube that connects the pharynx to the stomach, allowing food to pass from the mouth to the stomach.