Question

Match the following.

• A. Prevents dust entry
• B. Prevents collapse
• C. Increase surfacearea
• D. Assists inhalation

Answer 1

Nasal cavity is lined with a mucous membrane/lining that helps to keep your nose moist by making mucus. Mucus trap the germs/microbes, dust, etc.
The trachea has incomplete C-shaped rings of cartilage which prevent the tracheal walls from collapsing.
Alveoli are the delicate air sacs, elastic in nature, seen at the tip of bronchioles. Alveoli helps in increasing the surface area.
Diaphragm helps in the increasing and decreasing the pressure in chest cavity which helps in breathing.