Question

Which of the following is the primary function of the human respiratory system?

• A. To transport oxygen to tissues and carbon dioxide to the lungs.
• B. To remove waste products from the body.
• C. To facilitate digestion and absorption of nutrients.
• D. To maintain homeostasis by regulating blood pH.

Hint:

The respiratory system works in close collaboration with the circulatory system to transport gases. Oxygen is delivered to tissues, and carbon dioxide is removed through breathing.