Question

The opening of the pharynx into the respiratory system is called ________.

• A. glottis
• B. gullet
• C. bronchus
• D. alveoli

Answer 1

The correct option is A

glottis

The correct option is A.

Explanation of the correct option:

1. The pharynx is the common passage for both the respiratory and digestive systems.
2. The pharynx opens into the respiratory system through an opening called the glottis.
3. Glottis controls the inflow and outflow of air and carbon dioxide respectively in the respiratory passage.
4. There is also epiglottis that covers the windpipe while we swallow food to ensure no choking happens.

Explanation of the incorrect option:

Option B:

The pharynx opens into the digestive system through an opening called the gullet.

Option C:

The trachea is divided into two small tubes through which air passes to the bronchioles termed as bronchi.

Option D:

Alveoli are balloon-like structures, present in the terminal ends of the bronchioles. These are the functional units of the lungs.

Final Answer:

The opening of the pharynx into the respiratory system is called glottis.