Question

Explain the mechanism of gaseous exchange at bronchiole level.

Answer 1

Answer:

1. the trachea (wind pipe) is divided into two tubes called BRONCHI. As there are two lungs each bronchus (singular) enters the lungs on the same side.
2. In the lung, the bronchus divides into smaller and smaller branches called BRONCHIOLES which enters into each alveoli.
3. When oxygen from outside reaches the alveoli through bronchioles and the carbondioxide from alveoli moves out.
4. The inhaled air from outside enters into bronchioles through nostrils → nasal cavities → pharynx → larynx → trachea → bronchus.
5. The exhaled air from alveoli enters bronchioles → pharynx → nasal cavities → nostrils → outside