The Part of the Respiratory System with the Largest Internal

Question

The part of the respiratory system with the largest internal surface area is the ___________.
A)bronchi
B)visceral pleura
C)alveoli
D)trachea

Accepted Answer

The alveoli are small sacs within the lungs where gas exchange occurs between the air and blood. They have a very large surface area, estimated to be around 70 square meters in humans. This large surface area allows for efficient oxygen uptake and carbon dioxide removal from the body.