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
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
The average person's skin weighs twice as much as their brain.
131
The human brain doesn't stop developing until about 25 years old.
102
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31