20. which of the following describes the relationship between the respiratory system and cellular respiration?

a. the respiratory system provides a reactant and removes a by-product of cellular respiration.
b. the respiratory system generates enzymes used during cellular respiration.
c. the respiratory system transports oxygen to body cells performing cellular respiration.
d. the respiratory system removes carbon dioxide from body cells performing cellular respiration.

Cellular respiration is when the cells in your body make use of ATP and produce by-products.

The correct answer is:
D. The respiratory system removes carbon dioxide from body cells performing cellular respiration.

It isn't C because the lungs don't transport oxygen to cells. It transports oxygenated blood back to the heart where it is pumped through the body.

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.