Astounding facts about the human body
Hard working heart
. The heart is the hardest working muscle in the body. Every day, it creates enough energy to drive a lorry over 30 kilometres. Over a lifetime, thats equivalent to driving to the moon and back.
. The brain is 60 percent fat but it still works hard. At any given time your brain can generate up to 25 watts of power thatís enough to power a light bulb.
. Skin is the human bodys largest organ and is constantly renewing itself. Your skin sheds 50,000 cells every minute. Over a lifetime, that piles up to 18.1kg of skin.
. Your brain is always working. Scientists say the average person has roughly 70,000 thoughts each day and is actually more active while youre sleeping.
. Youre born with more than 300 bones but by the time youre an adult you have just 206. This is because some of the bones fuse together.
Womb with a view
. Babies in the womb grow 8,000 new brain cells every second. Newborn babies can recognise their motherís face after just a few hours.
. Scientists have discovered that the visual cortex of blind people can rewire itself to respond to stimuli received through touch and hearing, helping them to see by touch and sound.
. The brain itself doesnt have any pain receptors, so doesnt feel anything which is why surgeons can perform open brain procedures on patients while they are awake.
. During an average lifetime, the heart will pump nearly 1.5 million barrels of blood. A pumping human heart can squirt blood 9.1 metres.
. The typical human sneeze travels at just under 64 km/h. Thats the same speed as a running tiger!
. If your arteries, veins and capillaries were laid out end to end they would measure 100,000 km. Thats nearly enough to stretch two and a half times around the planet!
. Your hair grows about 6mm every four weeks and keeps on growing for up to six years. The hair then falls out and another grows in its place.
. Your mouth contains around 10,000 taste buds, most of which are located on and around the tiny bumps on your tongue. But you need the sense of smell to taste too.
. Smell is the oldest of all the senses - before sight, hearing or touch, creatures evolved to respond to chemicals around them. Your brain can remember over 50,000 different scents.
. The human brain is the most sophisticated thing in the known universe. Humans have more brain cells at the age of two than at any other point in their lives Ė but it will take nearly 20 years for the brain to mature.
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. ?Our blood is on a 60,000 mile journey per day.
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. Our eyes can distinguish up to ten million colour surfaces and take in more information than the largest telescope known to man.
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. ?Our heart beats around 100,00 times every day or about 30 million times in a year.
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. ?A sneeze generates a wind of 166 km/hr (100 mi/hr), and a cough moves out at 100 km/hr (60 mi/hr).
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. ?Nerve Impulses travel at over 400 km/hr (249 mi/hr).
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. A red blood cell can circumnavigate your body in under 20 seconds.
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. The average red blood cell lives for 120 days.
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. There are 2.5 trillion (give or take) of red blood cells in your body at any moment. To maintain this number, about two and a half million new ones need to be produced every second by your bone marrow.That s like a new population of the city of Toronto every second.
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. Considering all the tissues and cells in your body, 25 million new cells are being produced each second. That s a little less than the population of Canada every second !
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. Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.
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. The aorta, the largest artery in the body, is almost the diameter of a garden hose.
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. Give a tennis ball a good, hard squee ze. You re using about the same amount of force your heart uses to pump blood out to the body.
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. ?It s impossible to sneeze with your eyes open.
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. The life span of a taste bud is ten days.
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. If you could save all the times your eyes blink in one life time and use them all at once you would see blackness for 1.2 years!
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. The human body has less muscles in it than a caterpillar.
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. When you blush, your stomach lining also reddens.
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. One square inch of human skin contains 625 sweat glands.
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. The amount of carbon in the human body is enough to fill about 9,000 lead pencils.
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. ?Most people have lost fifty per cent of their taste buds by the time they reach the age of sixty.
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. ?The surface area of a human lung is equal to that of a tennis court.
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. Your body contains enough iron to make a spike strong enough to hold your weight.
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. ?From the age of thirty, humans gradually begin to shrink in size.
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. Our lungs inhale over two million litres of air every day, without even thinking. Their surface area is large enough to cover one side of a tennis court.
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. ?We give birth to over 200 billion red cells every day.
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. When we touch something, we send a message to our brain at 124 mph
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. We exercise at least 36 muscles when we smile.
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. We are about 70 percent water.
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. We make around 1 to 1.6 litres of saliva a day.
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. Our nose is our personal air conditioning system: it warms cold air, cools hot air and filters impurities.
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. ?In one square inch of our hand we have nine feet of blood vessels, 600 pain sensors, 9000 nerve endings, 36 heat sensors and 75 pressure sensors.
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. We have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and silicon in our bodies.
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. ?It is believed that the main purpose of eyebrows is to keep sweat out of the eyes.
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. A person can expect to breathe in about 45 pounds of dust over his/her lifetime.
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. There are more living organisms on the skin of a single human being than there are human beings on the surface of the earth.
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. ?The tiniest muscle, the stapedius of the middle ear , is just one fifth of an inch long.
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. You sit on the biggest muscle in your body, the gluteus maximus a.k.a. the butt. Each of the two cheeky muscles tips the scales at about two pounds (not including the overlying fat layer).
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. A fetus acquires fingerprints at the age of three months
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. Every square inch of the human body has an average of 32 million bacteria on it.
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. ?There is more bacteria in your mouth than the human population of the United States and Canada combined .
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. 10% of human dry weight comes from bacteria.
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. Humans are the only primates that don t have pigment in the palms of their hands.
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. Babies start dreaming even before they re born.
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. The heart pumps about 1 million barrels of blood during an average lifetime that s enough to fill 2 oil super tankers!
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. Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute.
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. Right handed people live, on average, nine years longer than left handed people do.
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. ?Did you know that you are more likely to be killed by a champagne cork than by a poisonous spider?
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. Americans on the average eat 18 acres of pizza every day.
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. On average people fear spiders more than they do death.
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. Banging your head against a wall uses 150 calories an hour.
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. The human heart creates enough pressure when it pumps blood, that it could squirt blood 30 feet.
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. If you toot consistently for 6 years and 9 months, enough gas is produced to create the energy of an atomic bomb.
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. If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee.
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. Every time you lick a stamp, you re consuming 1/10 of a calorie.
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. Your dad sweats enough each day to fill up a 6 pack of soda cans...and then some.
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. You breathe in about 7 quarts of air every minute. We breathe 13 pints of air every minute.
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. In your very own lifetime, you ll produce enough spit to fill two swimming pools.
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. People are the only animals in the world who cry tears.
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. Women blink nearly twice as much as men.
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. ?You can only smell 1/20th as well as a dog.
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. Children grow faster in the springtime.
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. ?The thumbnail grows the slowest; the middle nail grows the fastest
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. ?Our eyes never grow, and our nose and ears never stop growing.
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. Human teeth are almost as hard as rocks.
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. You burn more calories while sleeping than you do when watching television.
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. The average human head weighs about 10 pounds.
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. ?The average human brain weighs about 3 pounds.
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. The DNA helix measures 80 billionths of an inch wide.
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. Your eyeballs are three and a half percent salt.
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. If Barbie were life size, her measurements would be 39 23 33. She would stand seven feet, two inches tall and have a neck twice the length of a normal human s neck.
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. ?It takes about 20 seconds for a red blood cell to circle the whole body.
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. An average human drinks about 16,000 gallons of water in a lifetime.
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. Beards are the fastest growing hairs on the human body. If the average man never trimmed his beard, it would grow to nearly 30 feet long in his lifetime.
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. Humans shed about 600,000 particles of skin every hour about 1.5 pounds a year. By 70 years of age, an average person will have lost 105 pounds of skin.
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. ?It only takes 7 pounds of pressure to rip your ear off.
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. The human gut contains about 1kg (2.2 lbs) of bacteria. In fact, there are more bacteria growing in and on the body than there are human cells.
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. In 24 hours, the blood in the body travels a total of 12,000 miles that s four times the width of North America.
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. The length of your foot is the same as that of your forearm between your wrist and the inside of your elbow.
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. If you blink one eye you move over 200 muscles.
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. Humans have more facial muscles than any other animal on earth 22 on each side of the face.
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. Before their first birthday, average babies will have dribbled 255 pints of saliva. By the time they re two years old, they will have crawled 93 miles.
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. The human hand contains three main nerves, two major arteries and 27 different bones more of the body is devoted to controlling the hands than any other part of the body.
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. In the average lifetime, we spend five years eating and we consume around 7,000 times our own weight in food.
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. When we go to sleep and enter REM (Rapid Eye Movement),our bodies become completely paralysed as areas of the brain that control movement are de activated. It is this that stops us falling out of bed.
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. By the time a woman has reached her 60s, she will have released around 450 baby making eggs
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. When full, the human bladder can hold two pints of urine.
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. In a lifetime, a human being will grow six feet of nose hair and shed 42 lbs of dead skin.
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. A human being can look forward to having sex an average of 2,580 times with five different partners.
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. ?Skin can now be artificially grown.One amazing result of this is that the skin from one hand could be grown into enough to cover six football pitches.
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. There are 137 million light sensitive cells in the eye s retina and the fluid that fills the eye is changed 15 times a day.
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. ?Humans and dolphins are the only species that have sex for pleasure.
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. The average person falls asleep in seven minutes.
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. During your lifetime, you ll eat about 60,000 pounds of food, that s the weight of about 6 elephants!
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. ?In space, astronauts cannot cry, because there is no gravity, so the tears can t flow!
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. Your ribs move about 5 million times a year, every time you breathe!
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. A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realises it s there.
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. At birth we have over 300 bones. As we grow up, some of the bones begin to fuse together as a result an adult has only 206 bones.
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. The femur/thigh bone is the longest bone in our body, it is about a quarter of ones height.
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. The human body has 230 movable and semi movable joints
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. Our Brain has over 100 billion nerve cells.