Which of the following describes the gas exchange that occurs in the lungs?
A Carbon dioxide enters the body, while oxygen leaves the body.
B Oxygen and carbon dioxide both enter the body.
C Oxygen enters the body, while carbon dioxide leaves the body.
D Oxygen and carbon dioxide both leave the body.

Respuesta :

C. Oxygen enters the body, while carbon dioxide leaves the body.
Well, Oxygen and carbon dioxide both enter your lungs, but CO2 is taken out, so I would go with:

C. Oxygen enters the body, while carbon dioxide leaves the body.