The largest cell in the human body is the female egg and the smallest is the male sperm.
682
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It takes about 20 seconds for a red blood cell to circle the whole body.
102
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The human brain doesn't stop developing until about 25 years old.
102