The site of gas exchange in lungs is
- A. Bronchi
- B. Bronchioles
- C. Alveoli
- D. Trachea
Explanation
Alveoli are the site of gas exchange, with thin walls and large surface area for efficient O2 and CO2 diffusion.
Related questions
Most of the carbon dioxide carried in the blood travels as
One molecule of haemoglobin can combine with
An increase in carbon dioxide concentration makes haemoglobin release oxygen more readily. This is known as
The rate and depth of breathing are regulated mainly by the level of
The chloride shift refers to the movement of chloride ions