Question

what is the role of carbon dioxide in the body?
to be produced by the liver as a nutrient.
to be converted into oxygen by the lungs during respiration.
to be transported to the brain to aid in cognitive function.
to be stored in the bones for later use.
to be removed from the body as a waste product.

Explanation:

Carbon dioxide is a waste product of cellular respiration. The body removes it through the respiratory system. The liver does not produce it as a nutrient. Lungs do not convert it to oxygen (they take in oxygen and release carbon dioxide). It is not transported to the brain for cognitive function or stored in bones.

Answer:

To be removed from the body as a waste product.