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).
8
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
Held in farts enter your bloodstream and are bad for your body.
26
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The human brain doesn't stop developing until about 25 years old.
102
Your thumb is about the same size as your nose.
124
There's 100 trillion good bacteria living in your body.
17