Question

What tube is used by both the digestive and respiratory systems?

• A. Esophagus
• B. Larynx
• C. Pharynx
• D. None of these

Answer 1

The correct option is C

Pharynx

The correct option is C.

Explanation of the correct option :

1. The pharynx is the part of the neck and throat just beyond the mouth and nasal cavity.
2. The pharynx is the common passage for food as well as for air.
3. Epiglottis prevents the entry of food into the windpipe.

Explanation of the incorrect options :

Option A:

1. The esophagus is a muscular tube through which a small bolus of food passes from the mouth to the stomach with the help of peristalsis.
2. Only mucus glands are present in the wall of the esophagus which produces mucus to moisten and lubricate the lining of the esophageal tube.

Option B:

1. The anterior part of the trachea is dilated and is called the larynx or voice box. It is located between the pharynx and the trachea.
2. It has two pairs of vocal cords. The vibrations of vocal cords produce voices.

Final answer: Pharynx is used by both the digestive and respiratory systems.