The human brain cell can hold 5 times as much information as an encyclopaedia.
During your lifetime, you will produce enough saliva to fill two swimming pools.
Human body has enough iron in it to make a nail 3 inches long.
Each person sheds 22 kilograms of skin in his or her lifetime.
The acid in your stomach is strong enough to dissolve razor blades.
Everyone has a unique smell, except for identical twins, who smell the same.
Your body gives off enough heat in 30 minutes to bring half a gallon of water to a boil.
About 75% of the brain is made up of water and it acts as a shock absorber not just for brain, spinal cord, and foetus.
If the lining of mucus were to disappear from your stomach, your stomach would digest itself.
If you remove the minerals from a bone by soaking it overnight in a six percent solution of hydrochloric acid, it will become so soft, you could tie it in a knot.
The kidneys filter your blood up to 300 times per day.
Human fingers stretch and bend about 25 million times in a normal lifetime.
The human lungs contain approximately 2,400 kilometres of airways and 300 to 500 million hollow cavities, having a total surface area of about 70 square metres, roughly the same area as one side of a tennis court. Furthermore, if all of the capillaries that surround the lung cavities were unwound and laid end to end, they would extend for about 992 kilometres.
Nerve impulses to and from the brain travel as fast as 170 miles per hour. Neurons continue to grow throughout human life. Information travels at different speeds within different types of neurons.
About 32 million bacteria call every inch of your skin home. But don’t worry, a majority of these are harmless or even helpful bacteria.
The colder the room you sleep in, the higher the chances are that you’ll have a bad dream.
Three hundred million cells die in the human body every minute.
Humans can do longer without food than sleep. Provided there is water, the average human could survive a month to two months without food depending on their body fat and other factors. Sleep deprived people, however, start experiencing radical personality and psychological changes after only a few sleepless days. The longest recorded time anyone has ever gone without sleep is 11 days, at the end of which the experimenter was awake, but stumbled over words, hallucinated and frequently forgot what he was doing.
The most common blood type in the world is Type O. The rarest blood type, A-H or Bombay blood, due to the location of its discovery, has been found in less than hundred people since it was discovered.