It takes approximately 12 hours for food to entirely digest.
93
Every hour one billion cells in the body must be replaced.
17
On average, there's 100 billion neurons in the human brain.
83
Sex burns about 360 calories per hour.
861
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
While 7 men in 100 have some form of color blindness, only 1 woman in 1,000 suffers from it.
50
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22