Without oxygen, human life would not exist. Much like the water you drink and the food you eat, the oxygen you inhale plays an essential role in helping your body convert nutrients into usable energy, occurring through a process called cellular respiration.
Every time you take a breath, air passes over tiny air sacs in the lungs called alveoli. Oxygen is absorbed from the air and sent to every part of the body via the bloodstream providing your body with the energy it needs to survive and thrive.
Unfortunately, there are a number of diseases and disorders that can affect the body's ability to process oxygen, transport it throughout the body, or to take in the amount of oxygen that it needs. This results in a condition called hypoxemia or low blood oxygen levels.