During respiration, the exchange of gases takes place in:
(a) bronchi
(b) alveoli
(c) bronchioles
(d) trachea

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Solution

(b) alveoli
Alveoli are the pouch-like air sacs at the end of the small bronchioles. The walls of alveoli are very thin. Also, they are surrounded by very thin blood capillaries. It is in the alveoli that the gaseous exchange takes place.

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During respiration, the exchange of gases takes place in: (a) bronchi (b) alveoli (c) bronchioles (d) trachea

(b) alveoliAlveoli are the pouch-like air sacs at the end of the small bronchioles. The walls of alveoli are very thin. Also, they are surrounded by very thin blood capillaries. It is in the alveoli that the gaseous exchange takes place.

During respiration, the exchange of gases takes place in:
(a) bronchi
(b) alveoli
(c) bronchioles
(d) trachea

(b) alveoli
Alveoli are the pouch-like air sacs at the end of the small bronchioles. The walls of alveoli are very thin. Also, they are surrounded by very thin blood capillaries. It is in the alveoli that the gaseous exchange takes place.