Facts about our Body

• It is impossible to hum while your nose is plugged close.
• The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
• Humans have normal pulse of 70 heartbeats per minute. Elephants have a slower pulse of 27 heartbeats and for a canary has as high as 1000.
• A human heart pumps enough blood to fill 100 swimming pools in an average lifetime.In the same time it will beat almost three billion times.
• If all the blood vessels of your body were laid end to end, they would reach about 60,000 miles. That’s enough to go around the world twice. 
• In one day your heart beats 100,000 times.
• Half your body’s red blood cells are replaced every seven days.
• Coughing can cause air to move through your windpipe faster than the speed of sound – over a thousand feet per second.
• Germs do not only cause disease. A common bacterium, E. Coli, found in the intestine helps to digest green vegetables and beans. These bacteria also make vitamin K, which causes blood to clot. If we didn't have these germs, we would bleed to death whenever we got a small cut.
• It takes more muscles to frown than it does to smile.
• Everybody loses millions of skin cells every day which fall on the floor and get kicked up to land on all the surfaces in a room. You could say, “That’s me all over.”  ;)
• It takes food seven seconds to go from the mouth to the stomach via the oesophagus.
• A human’s small intestine is 6 meters long.
• The human body is 75% water and brain is 80% water.
• The strongest bone in your body is the femur (thigh bone), and it’s hollow. Your thigh bone is stronger than concrete.
• The average human dream lasts only 2 to 3 seconds.
• The average person has at least seven dreams a night.
• While sleeping, one person out of every eight snores, and one in ten grinds his teeth
• The farthest you can see with the naked eye is 2.4 million light years away! (140,000,000,000,000,000,000 miles.) That’s the distance to the giant Andromeda Galaxy. You can see it easily as a dim, large gray “cloud” almost directly overhead in a clear night sky.
• Your brain is move active and thinks more at night than during the day.
• Your tongue has 3,000 taste buds.
• Your fingernails grow almost four times as fast as your toenails.
• You blink your eyes over 10,000,000 a year.
• There were about 300 bones in your body when you were born, but by the time you reach adulthood you only have 206. This happens because many of them join together to make a single bone.
• The smallest bones in the human body are in your ear.
• Your mouth uses 75 muscles when you speak.
• When you wake up in the morning you are at taller than when you go to sleep, because you have let your spine straighten back out after all the bending, sitting, and moving you have done.
• It is impossible to sneeze with your eyes open.
• The average growth of hair is half an inch per month.
• If hair remains uncut, it can grow up to 5 feet long.
• Your tongue, eye, and jaw muscles are among the strongest muscles in your body.
• You can not drink water and breath air at a time.
• Research suggests that children tend to grow faster in spring season as compared to any other time of the year.
• Hugging releases oxytocin,which helps to heal physical wounds,makes someone trust you more.
• Toe-prints are also unique , just like your finger prints and imagine even your tongue print is unique.
• You have no sense of smell when you're sleeping.
• You can see your nose all the time but somehow your brain always ignores it.
• 50% of human DNA is same as in banana.
• All babies are color blind when they are born ,so they only see black & white.
• People with dark color skin wrinkle later than the people having light color skins
• About 200 muscles are used when we take a single step
• Weight of the eyeball ! The eyeball of a human weighs approximately 28 grams
• People generally read 25% slower from a computer screen compared to paper.
• The tongue is the strongest muscle in the human body.
• Our fingers don't have any muscles. The muscles which move our finger joints are located in the palm and up in the forearm.
• An adult human body contains approximately 100 trillion cells!
• Our brain does not feel pain! Even though brain processes pain signals,the brain itself actually does not feel pain.
• Bones in an adult account for 14% of the body's total weight.
• The tips of your fingers have enough strength to support the weight of your whole body
• Men get hiccups more often than women.
• Enamel is hardest substance in the human body.
• Blood is 6 times thicker than water.
• Our kidneys filter about 1.3 liters of blood every minute & expel up to 1.4 liters of urine in a day.
• The reason honey is so easy to digest is that it’s already been digested by a bee.
• A woman has approximately 4.5 liters of blood in her body, while men have 5.6 liters
• The only part of the body that has no blood supply is the cornea in the eye. It takes in oxygen directly from the air.
• It takes about 20 seconds for a red blood cell to circle the whole body.
• Babies are born with pink lungs but they darken in color as we breathe in polluted air.
• Your right lung is bigger than left lung! The left lung is small so as to adjust heart in that part !
• Human hair and fingernails continue to grow after death
• You burn more calorie while sleeping than watching TV.
• The human body has enough iron in it to make 3 inches long nail.