What is cardio respiratory endurance. answers a. the ability of the body's circulatory and respiratory systems to supply fuel and oxygen during sustained physical activity. b. the ability to maintain a sufficient level of oxygen over an extended period of physical activity. c. the ability to maintain stable levels of oxygen and blood flow during an extended period of physical activity.

A. The ability of the body's circulatory and respiratory systems to supply fuel and oxygen during sustained physical activity.

Remember:

Cardio respiratory endurance is the level at which your heart, lungs, and muscles work together when you’re exercising for an extended period of time. This shows how efficiently your cardio respiratory system functions, and is an indicator of how physically fit and healthy you are.

Your body needs a certain amount of oxygen so that it can function through day to day tasks, in this case it is exercise. Without these functions your body would shut down which could be fatal because you need oxygen to travel through your brain, heart, and other vital organs.

Cardio- Heart

Respiratory- Lungs

Endurance (in terms of health)- Exercise

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