Oxygen is essential for our body It is what keeps us alive However certain conditions and factors can cause low oxygen levels ...

The human body takes in oxygen and lets out carbon dioxide ... The effect of asthma, smoking and exercise on the gas exchange system The gas exchange system is the parts of the body involved ...

Gas exchange allows oxygen to travel into your cells for respiration whilst also removing carbon dioxide, which is a waste substance made by the process of respiration. Respiration is a vital ...