The respiratory system provides oxygen to the blood in the body, while removing carbon dioxide. Which system directly interacts with the respiratory system to maintain homeostasis?

A. the excretory system when it sends out liquid waste as urea

B. the skeletal system when oxygen and glucose around the ribs are absorbed

C. the nervous system when the brain regulates the body’s breathing and heart rate

D. the digestive system when food is broke n down for nutrients