Question

which organ of the respiratory system is used by both the respiratory and digestive systems?
a pharynx
b stomach
c trachea
d nasal cavity

Explanation:

The pharynx is a muscular tube that serves as a common passageway for both air (respiratory system) and food (digestive system). The stomach is only part of the digestive system, the trachea is only part of the respiratory system, and the nasal cavity is mainly for respiration and not involved in digestion.

Answer:

A. pharynx