Some curious facts about human body........

• Your heart beats around 100000 times a day, 36500000 times a year and over a billion times if you live beyond 30
• The lightest organ in the human body is the lung. Adult lungs have a surface area of around 70 square metres! 
• The brain uses over a quarter of the oxygen used by the human body
• Humans have a stage of sleep that features rapid eye movement (REM). REM sleep makes up around 25% of total sleep time and is often when you have your most vivid dreams
• The smallest bone found in the human body is located in the middle ear. The staples (or stirrup) bone is only 2.8 millimetres long
• Infants blink only once or twice a minute while adults average around 10
• As well as having unique fingerprints, humans also have unique tongue prints
• Your sense of smell is around 10000 times more sensitive than your sense of taste
• If you fully stretch your arms out, the fingertip to fingertip length is almost exactly your body height
• The length between your elbow and hand (forearm) equals the length of your foot
• Corneas are the only tissues that don't require blood.
• There's about 1.8m (6 feet) long DNA inside every cell nucleus in our body, and an average adult body contains around 50 trillion (million million) cells.
• The nails on long fingers grow faster than short fingers; and fingernails grow four times faster than toenails.
• The jaw is the strongest muscle in the human body in terms of exerting force.