Single Answer MCQ
Q-00019515
How does the structure of alveoli facilitate gas exchange in the lungs?
1
By being flat and smooth
2
By having a large surface area
3
By being filled with fluid
4
By having a thick wall
Answer and Solution
Answer
B. By having a large surface area
Solution:
Alveoli have a large surface area and are thin-walled, allowing for efficient gas exchange as oxygen diffuses into the blood while carbon dioxide diffuses out.
Watch Video Solution