Question

How exchange of gases takes place during respiration in lungs?

Answer 1

The function of the respiratory system is to exchange two gases: oxygen and carbon dioxide. The exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them.

Answer 2

Oxygen enters the trachea via the nostrils and is transported to the bronchi which further divides into bronchioles and further to alveoli.
The alveoli has a large surface area and the exchange of gases take place using osmosis.