10 facta about the human body

1. brain cells live longer than all of the other cells in your body . 2 The more you concentrate  the less you blink. 3 your teeth are harder than your bones. 4  some people can her their eyeballs moving. 5 it is not possible to tickle yourself.  6 you can buy fake eyebrows and eyelashes made out  of real hair . 7 fingernails grow  faster than toenails.  8 your  heart  beats about 100,000 times each day. 9 your  foot  is about the same length as the distance below  and wrist. 10 the saliva you produce in your lifetime could  fill nearly  30,000 water bottles  form a called national  geographic  kids almanac 2020.