Human Body Facts

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• The brain uses over a quarter of the oxygen used by the human body. More human brain facts.
• Your heart beats around 100000 times a day, 36500000 times a year and over a billion times if you live beyond 30. More human heart facts.
• Red blood cells carry oxygen around the body. They are created inside the bone marrow of your bones. More blood facts.
• The colour of a humans skin is determined by the level of pigment melanin that the body produces. Those with small amounts of melanin have light skin while those with large amounts have dark skin. More skin facts.
• Adult lungs have a surface area of around 70 square metres! More lung facts.
• 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. More eye facts.
• Most adults have 32 teeth. More teeth facts.
• 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. More ear facts.
• Your nose and ears continue growing throughout your entire life. More nose facts.
• 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.
• The left side of your body is controlled by the right side of your brain while the right side of your body is controlled by the left side of your brain.
• Antibiotics are only effective against bacteria, they won't help in fighting off a virus.
• It takes the body around 12 hours to completely digest eaten food.
• Your sense of smell is around 10000 times more sensitive than your sense of taste.
• Research suggests that Children tend to grow faster in spring season as compared to any other time of the year !
• Food is either cooled or warmed to a suitable temperature in the mouth !
• Hugging releases oxytocin,which helps to heal physical wounds,makes someone trust you more !
• Do you know that your Toe-prints are also unique , just like your finger prints !And imagine even your tongue print is unique!
• You know ,you have no sense of smell when you're sleeping!
• You know ,you can see your nose all the time but somehow your brain always ignores it!
• We all blink after every few seconds, but do we know the purpose of blinking ! Blinking helps to wash tears over our eyeballs.That keeps them clean and moist.
• An average person has over 1,460 dreams a year which is about 4 dreams every night!
• On a clear night ,the human eye can see between 2000 to 3000 stars in the sky.
• Do you know the similarity between human body and a banana? You will be amazed to know that 50% of human DNA is same as in banana!
• The human body has enough iron in it to make 3 inches long nail.
• Click & See free Human Body Systems - videos Science Cartoon Videos
• 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
• While sleeping, one person out of every eight snores, and one in ten grinds his teeth
• 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!
• Guess how many muscles are working when you take a step! Well, 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.
• Do you know ,it is impossible to sneeze with your eyes open !
• And do you know ,it is impossible to hum while your nose is plugged close !
• Do you know 'rhinoplasty' is the name given to plastic surgery which involves nose !
• Have you heard about Anosmia ,Dysosmia ,Hyperosmia? These all words are related to sense of smelling. Anosmia means inability to smell and Dysosmia is a condition where things don't smell like they should smell whereas Hyperosmia means strong sense of smelling !
• Here is one more trivia about nose :the technical term for sense of smell is 'olfaction' !
• Your brain is move active and thinks more at night than during the day.
• Do you know what is Uvula? It is the small piece of the small tissue dangling over the tongue.
• Now this is cool ,the tongue is the strongest muscle in the human body.
• And did you know that 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!
• Your tongue has 3,000 taste buds.
• Do you know ,your brain is 80% water?
• No pain in the brain! Do you know 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
• When you are born with 300 bones in their body, but as an adult you only have 206 bones. This happens because many of them join together to make a single bone.
• The outsides of a bone are hard, they are light and soft inside. They are about 75% water.
• The strongest bone in your body is the femur (thighbone), and it's hollow!
• The smallest bone in the human body is the staples bone which is located in the ear,it is also called stirrup .
• Men get hiccups more often than women.
• A sneeze can exceed the speed of 100 miles per hour.When a sneeze leaves your body ,it is at such a high speed that you should avoid supressing it.
• It takes food only seven seconds to go from the mouth to the stomach via the esophagus, pretty fast ! right?
• Enamel is hardest substance in the human body.
• Fingernails grow nearly 4 times faster than toenails!
• Women hearts beat faster than men. Also women blink more than men !
• In one day ,your heart beats 100,000 times.
• And do you know that breathing rate is faster in children and women than men !
• The normal pulse is 70 heartbeats per minute.
• Blood is such a good stain that Native Americans used it for paint.
• Did you know that 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 capacity of an adult human bladder ranges from approximately 600 ml to 800 ml. The exact maximum capacity varies from person to person. But remember that the urge to urinate is triggered when the bladder contains about 100 to 200 mls , much lower than full capacity. As the bladder fills with fluid, receptors in the bladder wall get stretched.
• Do you know a woman has approximately 4.5 liters of blood in her body, while men have 5.6 liters?
• Your blood takes a very long trip through your body. If you could stretch out all of a human's blood vessels, they would be about 60,000 miles long. That's enough to go around the world twice.
• Did you know that, our heart (which is one of the main muscles ) is so powerful that it can squirt the blood no less than 9 meters high? It's because it’s programmed to deliver the blood even in the less accessible areas of the body, like the toes & the fingertips, and therefore, in order to do this, it’s necessary for the heart to create lots of pressure inside the veins.
• People with darker skin will not wrinkle as fast as people with lighter skin.
• The reason honey is so easy to digest is that it’s already been digested by a bee.
• 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.
• The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
• Women blink nearly twice as much as men.
• It takes about 20 seconds for a red blood cell to circle the whole body.
• Every drop of blood in your body is filtered by your body over 300 times a day.
• 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.
• Almost half of total bones in human body are in hands & feet.
• The Hyoid bone, in your throat ,is the only bone in your body which not attached to other bone..
• Your skeleton keeps changing every 10 years, that means your bodies keep renewing themselves so every 10 year you have a new skeleton.
• The word Karate means, "empty hand”.
• The best time for a person to buy shoes is in the afternoon. This is because the foot tends to swell a bit around this time.
• Do you know left hand side of your brain controls right -side of your body whereas right-hand side controls left part of body .
• Do you know everybody has a strong eye and one weak!
• Pupils in eyes get their name because the picture they give is small ,like schoolchildren !
• Rods & Cons are the two types of light sensitive cells in your eyes.Rods tell about brightness of color but Cones tell about what color it is. Cones don't work well in night ,that is why colors look gray at night!
• The brain grows quickest till the age of 5.!
• And do you know that unlike other body cells ,brain cells can not regenerate . Once brain cells are damaged ,they are not repaired !
• A normal human being can survive for 20 days without eating but it can survive only for 2 days without drinking!
• Your blood carries food & oxygen to all of your body.!
• Body fat is not particularly hazardous to health untill the level of total body fat reaches 35% for men & 40% for woman
• About 90% of what we eat is assimilated in the small intestine.
• Human Bones consist of 50% water & 50% solid material.
• 14 bones make up the human face.
• It is considered that average quantity of blood in a man is 6.8 litres wheas it is 500 ml less in an average woman
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• Hair is made of protein and keratin & has no blood supply.And common belief that shaving facial hair makes them grow faster or thicker is ,not true.
• An average person has 100,000 hairs on his/her head. Each hair grows about 5 inches (12.7 cm) every year.
• There are 60,000 miles (97,000 km) of blood vessels in each human.
• The average adult can read 150 to 200 words per minute and the vocabulary of an average person consists of only 5,000 - 7,000 words.
• The only part of the body that has no blood supply is the cornea in the eye.It takes in oxygen directly from air.
• The human heart creates enough pressure while pumping to squirt blood to 30 feet.
• Asmall trivia about human feet: The human feet have 500,000 sweat glands and can produce more than a pint of sweat everyday.
• An amazing fact :In an adult human body,there are about 60,000 miles of blood vessels .
• A mind-boggling fact:The ear in human body has over 25,000 tiny hair cells to help us hear each and every sound!
• Have you heard about 'Glabella' ! It is the space between your eyebrows!
• Another interesting word 'Borborygmi' -it is the noise or sound which our stomach makes when we are hungry!
• A small important fact about human ears and sound:Ears convert sound waves into nerve impulses that are sent to brain !
• The only joint less bone in human body is Hyoid bone in the throat !
• Do you know that if human eye was a digital camera ,it would have 576 megapixels.
• Another fact about blood :An average human adult has between 4.7 and 5 liters of blood in their body. Blood accounts for about 7% per cent of our total body weight!
• Can you feel the pulse in your wrist? For humans the normal pulse is 70 heartbeats per minute. Elephants have a slower pulse of 27 and for a canary it is 1000!
• If all the blood vessels in your body were laid end to end, they would reach about 60,000 miles.
• Abraham Lincoln probably had a medical condition called Marfans syndrome. Some of its symptoms are extremely long bones, curved spine, an arm span that is longer than the persons height, eye problems, heart problems and very little fat. It is a rare, inherited condition.
• In one day your heart beats 100,000 times.
• Half your body’s red blood cells are replaced every seven days.
• By the time you are 70 you will have easily drunk over 12,000 gallons of water.
• Coughing can cause air to move through your windpipe faster than the speed of sound – over a thousand feet per second!
• Germs only cause disease, right? But a common bacterium, E. Coli, found in the intestine helps us digest green vegetables and beans (also making gases – pew!). These same 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.
• That dust on rugs and your furniture is not only dirt. It’s mostly made of dead skin cells. 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 esophagus.
• Submitted by: Lovella
• A human’s small intestine is 6 meters long.
• The human body is 75% water.
• Submitted by: veggykid15
• Your blood takes a very long trip through your body. If you could stretch out all of a human’s blood vessels, they would be about 60,000 miles long. That’s enough to go around the world twice.
• Submitted by: Todd
• The strongest bone in your body is the femur (thighbone), and it’s hollow!
• Submitted by: aquagirl
• The width of your armspan stretched out is the length of your whole body.
• Submitted by: blue120
• The average human dream lasts only 2 to 3 seconds.
• The average American over fifty will have spent 5 years waiting in lines.
• 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.
• Submitted by: Todd
• The average person has at least seven dreams a night.
• Submitted by: Christina & Jessica
• Your brain is move active and thinks more at night than during the day.
• Submitted by: Christina & Jessica
• Your brain is 80% water.
• 85% of the population can curl their tongue into a tube.
• Your tongue has 3,000 taste buds.
• Your forearm (from inside of elbow to inside of wrist) is the same length as your foot.
• Submitted by: Josh
• A sneeze travels at over 100 miles per hour. Gesundheit!
• Your thigh bone is stronger than concrete.
• 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.
• The smallest bones in the human body are in your ear!
• Submitted by: The Phoenix
• Your mouth uses 75 muscles when you speak!
• Submitted by: Devin
• 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!
• Submitted by: Katie Mae
• It is impossible to sneeze with your eyes open.
• Submitted by: Mazda Roxx
• The average growth of hair is half an inch per month.
• Submitted by: Amylia
• If hair remains uncut, it can grow up to 5 feet long.
• Submitted by: Amylia
• Your tongue, eye, and jaw muscles are among the strongest muscles in your body.