Oxygen Facts

Brain cells begin to die after just one minute without oxygen. After about 4 to 6 minutes of oxygen deprivation, severe and often irreversible brain damage occurs.

Oxygen, carbon, hydrogen, and nitrogen make up 96% of the human body by mass.

If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.

Scientists have developed injectable microparticles filled with oxygen that can keep animals alive for up to 30 minutes without breathing, potentially revolutionizing emergency medicine.

Mars had an oxygen-rich atmosphere around 4 billion years ago

The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).