Human body did you knows

• Did you know fingernails grow faster than toenails
• Did you know humans shed and regrow outer skin cells every 27 days (almost 1,000 new skins in a lifetime)
• Did you know it takes 17 muscles to smile and 43 to frown
• Did you know the human body has over 600 muscles (40% of the bodys weight)
• Did you know in 1900 the average life span in the US was 47
• Did you know DNA stands for Deoxyribonucleicacid