Question Detail
Question
The respiratory system is essential for providing ____ needed for cellular functions and removing ____, a waste product of metabolism.
Correct Answer
Option C is the correct answer.
Detailed Explanation
The primary function of the respiratory system is to facilitate the exchange of gases: taking in oxygen, which is vital for cellular respiration (energy production), and expelling carbon dioxide, a metabolic waste product.
Hint
What gas do organisms take in for energy production, and what gas do they release as a waste product?