Question Detail
Question
This is the actual location where the exchange of oxygen and carbon dioxide occurs in the human body.
Correct Answer
Option A is the correct answer.
Detailed Explanation
The alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place between the air and the blood. The trachea, mouth, and bronchus are part of the respiratory pathway but not the primary sites of gas exchange.
Hint
These are very small, numerous structures at the end of the respiratory tree.