1)During your lifetime, you will produce enough saliva to fill two swimming pools.
2) Women’s hearts beat faster than men’s.
3)Sneezes regularly exceed 100 mph & nerve impulses to and from the brain travel as fast as 170 miles per hour.
4)Your eyes are always the same size from birth (but your nose and ears never stop growing).
5)It takes 17 muscles to smile and 43 to frown.