Here are some interesting facts about our body The stomach takes 20 minutes to tell the brain that it is full and that one should stop eating. One uses 14 muscles to smile and 43 to frown. The strongest muscle of the body is the masseter muscle,which is located in the jaw. Our brain sends messages at the rate of 375kmph Our heart beats about 100,000 times/day. A nose can remember 50,000 scents. Woman blink twice as much as men. The liver is the only major organ in the human body that can regenerate itself if part of it is removed. Babies are born without knee cap.They don't appear till they are 2-6 years of age. It is impossible to sneeze with our eyes open.