Question Detail
Question
The respiratory system is crucial for providing _______ for cellular functions and for eliminating _______, a metabolic waste product.
Correct Answer
Option B is the correct answer.
Detailed Explanation
The primary role of the respiratory system is to take in oxygen, which is vital for cellular respiration and energy production, and to expel carbon dioxide, a toxic byproduct of metabolism.
Hint
What gas do we breathe in, and what gas do we breathe out?