Q. Primary site of the gaseous exchange in humans is
A) Lungs
B) Alveoli
C) Bronchus
D) Diaphragm
Explanation
Alveoli are the primary site of exchange of gases. Exchange of gases also occur between the blood and tissue. $O_{2}$ and $CO_{2}$ are exchanged in these sites by simple diffusion, mainly based on pressure concentration gradient
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.