Question

This system releases carbon dioxide gas and takes in oxygen.

A: respiratory
B: ciruclatory
C: skeletal
D: digestive

Answer 1

a. respiratory

Step-by-step explanation:

The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.