Question

During respiration, the exchange of gases takes place in ______.

Options

• bronchi

• alveoli

• bronchioles

• trachea

Answer 1

During respiration, the exchange of gases takes place in alveoli. 

Explanation:

Alveoli are tiny, pouch-like air sacs present at the end of bronchioles. Their walls are very thin and surrounded by a dense network of fine blood capillaries. This structure allows efficient diffusion of gases, so the exchange of oxygen and carbon dioxide takes place in the alveoli.