Question

how does the respiratory system help the body maintain homeostasis?
it keeps oxygen and carbon dioxide in the body at constant levels.
it keeps the temperature of the body within a normal range.
it keeps levels of water and waste in the blood within a normal range.

Explanation:

The respiratory system is responsible for gas - exchange. It takes in oxygen and expels carbon dioxide to keep their levels constant in the body, which is crucial for homeostasis. Body temperature is mainly regulated by the integumentary system and metabolic processes. The urinary system helps maintain water and waste levels in the blood.

Answer:

It keeps oxygen and carbon dioxide in the body at constant levels.