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
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
There are about 1,400 different species of bacteria in your belly button.
10
The human sigh acts as a physiological reset button.
23
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12