Question Detail
Question
The respiratory system is essential for providing _______ needed for cellular functions and removing _______ a waste product of metabolism.
Correct Answer
Option D is the correct answer.
Detailed Explanation
The respiratory system takes in oxygen, which is essential for cellular respiration to produce energy, and it removes carbon dioxide, a waste product generated during metabolism.
Hint
What gas do living organisms need for energy production, and what waste gas do they produce?