Question

What is the relationship between the digestive system and respiration?

O The digestive system takes in the oxygen needed for respiration in the body.
O The digestive system throws the waste materials of respiration out of the body.
O The digestive system delivers oxygen and food to the cells to be used in respiration.
O The digestive system breaks food down into the molecules that can be used in respiration

Answer 1

I'm pretty sure the answer is the 4th one: The digestive system delivers oxygen and food to the cells to be used in respiration.

Answer 2

D. The digestive system breaks food down into the molecules that can be used in respiration.

Step-by-step explanation: