We breathe in oxygen from the external environment. Oxygen passes into our lungs and is passed into the blood capilaries. Here it is carried to all the cells throughout the body.
It diffuses into the cells and is necessary for the final stages of energy production by aerobic respiration. Therefore, it is necessary for powering all cellular processes.
<span>The answer to this is Halcion which is medical treatment given to patients with sleeping disorders such as insomnia. It helps you fall asleep faster and for a longer period of time.</span>
