The average sperm cell swims at 8 inches per hour.
4
It takes about 20 seconds for a red blood cell to circle the whole body.
102
When your face blushes, the lining of your stomach turns red, too.
154
The skin on your lips is 200 times more sensitive than your fingertips.
345
In older people, memory is best early in the morning and then declines during the late afternoon.
33
By the age of 60, most people have lost 50% of their taste buds.
17
Like fingerprints, everyone's tongue print is different!
71
Unlike dogs, pigs, and some other mammals, humans cannot taste water. They taste only the chemicals and impurities in the water.
95