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Generally 1 hour.
recovery depends on the duration and intensity of the activity. due to do fatiging by-products the aerobic energy system can recover quickly from small boughts of exercise yet when the duration increases so does the recovery period and depending on your leve of fittness may take up to 3-4 days
Liver
Men's nipples can lactate, but not under normal circumstances. This is often associated with the use of human growth hormone and can even be an indicator of cancer.
Marc Beaudoin has written: 'Glucose, lactate and lactate dehydrogenase levels in the human kidney carcinoma cell line A498 (ATCC HTB-44)'
Breathing. Except that respiration needs Energy.
The Respiratory system help us meets its needs by giving us energy
The cardiovascular system in the human body is involved in energy metabolism by pumping blood throughout the body, which in turn burns energy stored in the body, which in turn speeds up a body's metabolism.
Simple we cannot eat.So if no food no energy.No energy no work.May simple answer to it means Death. No human being can live with out a digestive system.
Yes, we take in energy in the form of food that we digest and use for our cells and we give off heat (and sound energy when we talk).
3 Minutes.
energy that comes from a human