The respiratory system A) obtains O₂ from and eliminates CO₂ to the internal environment B) includes the heart and lungs C) helps regulate the pH of the internal environment by removing acid-forming CO₂ from the blood D) all of the these E) obtains O₂ from and eliminates CO₂ to the internal environment and helps regulate the pH of the internal environment by removing acid-forming CO₂ from the blood

Question

Quizplus · Accepted Answer

The respiratory system helps regulate the pH of the internal environment by removing acid-forming CO2 from the blood. It does not include the heart, which is part of the circulatory system.

The Respiratory System