Answer: It increases the efficiency with which the body delivers oxygen and nutrients to its cells.
Step-by-step explanation:
Cardiorespiratory endurance is a measurement of functioning of the heart, lungs and the muscles to keep the body active. During the exercise the body requirement for oxygen increases the heart pumps the blood faster so that the demand for each cell for oxygen can met. The lungs helps in the attaining stability of the overall increased rhythm of respiration helping in inhalation and exhalation of gases. This way, the cardio-respiratory endurance increases the efficiency with which the body delivers oxygen and nutrients to its cells.