The human body system that allows us to breathe in an out is:
A) the digestive system.
B) the excretory system.
C) the skin system.
D) the respiratory system.

Question

The human body system that allows us to breathe in an out is:​
A) ​the digestive system.
B) ​the excretory system.
C) ​the skin system.
D) ​the respiratory system.

Quizplus · Accepted Answer

The respiratory system is responsible for breathing in oxygen and exhaling carbon dioxide. This system includes the lungs, bronchi, trachea, and other structures that allow for the exchange of gases in the body.

The Human Body System That Allows Us to Breathe in an Out