Which body parts are shared by the digestive and respiratory systems?

The mouth and pharynx are the correct answer because they serve both the digestive and respiratory systems. The mouth is the entry point for food and is also where air is taken in. The pharynx, or throat, is a shared passageway that connects both systems; it allows food to pass to the esophagus and air to enter the trachea. This anatomical feature supports the dual functions of ingestion and respiration, highlighting the interconnectedness of the two systems.

In this context, the other body parts listed do not serve both systems. The stomach is involved solely in digestion, while the lungs are dedicated to respiration. The esophagus and trachea, although they are located near one another, function separately; the esophagus carries food to the stomach, whereas the trachea conducts air to the lungs. Lastly, the diaphragm is a muscle integral to the respiratory system, playing a key role in breathing, while the intestines are part of the digestive system, processing food.