Question

8. Humans need oxygen to break down food in order to provide energy for cells. The oxygen needed for this process is delivered by an organ system called the A. respiratory system. B. lungs. C. digestive system. D. alveolus.

Answer 1

Answer:

The answer is B. Lungs

Answer 2

Answer: B

Explanation: we use lungs to breathe, so we take oxygen by lungs.