Biology Middle School

What is a function of the respiratory system?
A. to provide the body with nutrients, which reacts with food to produce energy
B. to provide the body with oxygen, which reacts with food to produce energy
C. to provide the body with carbon dioxide which reacts with food to produce energy
D. to provide the cells with water, which is used as a source of energy

Answers

Answer 1
B. The respiratory system is that breathing supplies oxygen to the blood and gets rid of carbon dioxide; includes airways such as the trachea, as well as lungs and alveoli.
Answer 2
B. To provide the body with oxygen

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