Amazing facts about our body
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    Amazing facts about our body Amazing facts about our body Document Transcript

    • Amazing Facts about our Body • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 50,000 of the cells in your body will die and be replaced with: new cells, all while you have been reading this sentence! In one hour, your heart works hard enough to produce the equivalent energy to raise almost 1 ton of weight 1 yard off: the ground. Scientists have counted over 500 different liver functions. In 1 square inch of skin there lie 4 yards of nerve fibers, 1300 nerve cells, 100 sweat glands, 3 million cells, and 3 yards of blood vessels. The structural plan of a whale's, a dog's, a bird's and a man's 'arm' is exactly the same. The world's first test-tube twins were born in June 1981. There are 45 miles of nerves in the skin of a human being. In a year, a person’s heart beats 40,000,000 times. Most people blink about 25 times a minute. : Each square inch of human skin consists of twenty feet of: blood vessels. : Nerve impulses to and from the brain travel as fast as 170: miles per hour. Your stomach has to produce a new layer of mucus every two weeks otherwise it will digest itself. Your left lung is smaller than your right lung to make room for: your heart. You use an average of 43 muscles for a frown. You use an average of 17 muscles for a smile. Every two thousand frowns: creates one wrinkle. The average human blinks his eyes 6,205,000 times each year. : The average human produces a quart of saliva a day or 10,000 gallons in a lifetime. Every person has a unique tongue print. The average human's heart will beat 3,000 million times in their lifetime. The average human will pump 48 million gallons of blood in: their lifetime. : You burn 26 calories in a one-minute kiss. The average human body contains enough: Sulphur to kill all fleas on an average dog, Carbon to make 900 pencils, Potassium to fire: a toy cannon, Fat to make 7 bars of soap, Phosphorus to make: 2,200 match heads, and enough Water to fill a ten-gallon tank. Among the first known "dentists" of the world were the Etruscans. : In 700 BC they carved false teeth from the teeth of various: Mammals: and produced partial bridgework good enough to eat with. Ophthalmic surgery was one of the most advanced areas of medicine in the ancient world. Detailed descriptions of delicate cataract surgery with sophisticated needle syringes is contained in the medical writings of Celsus (A.D.14-37) A sneeze zooms out of your mouth at over 100 m.p.h. If you were freeze-dried, 10% of your body weight would be from: the microorganisms on your body. According to the World Health Organization, there are: approximately 100 million acts of sexual intercourse each day. Your ears and nose continue to grow throughout your entire life. When you eat meat and drink milk in the same meal, your body does not absorb any of the milk's calcium. It is best to have 2 hours between the milk and meat intake. Only humans and horses have hymens. The tooth is the only part of the human body that can't repair itself. Every human spent about half an hour as a single cell. : One human brain generates more electrical impulses in a single day than all of the world's telephones put together. THE TYANA TABLOID: 2 APRIL 2000 We have a whole pharmacy within us. We can create any drug inside us. Our bodies are recreating themselves constantly - we, make a skeleton every 3 months, new skin every month. We are capable of reversing the Aging Process!! 20 Little Known Facts about the Human Body
    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • A human being loses an average of 40 to 100 strands of hair a day. A cough releases an explosive charge of air that moves at speeds up to 60 mph. Every time you lick a stamp, you're consuming 1/10 of a calorie. A fetus acquires fingerprints at the age of three months. A sneeze can exceed the speed of 100 mph. Every person has a unique tongue print. According to German researchers, the risk of heart attack is higher on Monday than any other day of the week. After spending hours working at a computer display, look at a blank piece of white paper. It will probably appear pink. An average human drinks about 16,000 gallons of water in a lifetime. A fingernail or toenail takes about 6 months to grow from base to tip. An average human scalp has 100,000 hairs. It takes 17 muscles to smile and 43 to frown. Babies are born with 300 bones, but by adulthood we have only 206 in our bodies. 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. By age sixty, most people have lost half of their taste buds. By the time you turn 70, your heart will have beat some two-and-a-half billion times (figuring on an average of 70 beats per minute.) Each square inch of human skin consists of twenty feet of blood vessels. Every human spent about half an hour as a single cell. Every person has a unique tongue print. Every square inch of the human body has an average of 32 million bacteria on it. Fingernails grow faster than toenails. 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. There are approx. 550 hairs in the eyebrow. The strongest muscle in the human body is the tongue. The life span of a taste bud is 10 days. The world's youngest parents were 8 and 9 and lived in China in 1910. The largest known kidney stone weighed 1.36 kilograms. Most dust particles in your house are made from dead skin. Kidney stones come in any color--from yellow to brown. Babies are born without kneecaps. They appear when the child is 2-6 years of age. Your body is creating and killing 15 million red blood cells per second! The average human produces 10,000 gallons of saliva in a lifetime. If you ate too many carrots you would turn orange. The force of 1 billion people jumping at the same time is equal to 500 tons of TNT. A baby is born every seven seconds. You can tell if a skunk is about if you smell only .000000000000071 ounce of its spray. You breathe about 10 million times a year. The colder the rooms you sleep in, the better the chances are that you'll have a bad dream. The foot is the most common body part bitten by insects. The most common time for a wake up call is 7 a.m. The typical person goes to the bathroom 6 times a day. The fastest growing nail is on the middle finger. The most sensitive finger on the human hand is the index finger. The human body weighs 40 times more than the brain. After eating too much, your hearing is less sharp. A person swallows approx. 295 times while eating dinner. Your urine will turn bright yellow if you eat too much asparagus. There are more people alive today than have ever died. The human body is better suited to two four-hour sleep cycles than one eight-hour one.
    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • A man's beard contains between 7000 and 15,000 hairs. A beard grows an average of 140mm a year A hair is 70 per cent easier to cut when soaked in warm water for two minutes Women's hair is about half the diameter of men's hair During an average lifetime, a man will spend 3,350 hours removing 8.4 meters of stubble 4.5 million People have their health 'adversely affected' by air pollutants each year. 4 million children die each year from inhaling smoke from indoor cooking fires that burn wood and Dung 4 million people die annually from diarrhea infections, caused by poor sanitary conditions The hardest bone in the human body is the jawbone. A person's sense of smell is the first to go. A sneeze leaves your mouth at over 600 mph. The flu was first described by Hippocrates in 412 BC The human body contains about 10 gallons for water making up 60% of body weight. Your body creates as much as two quarts of saliva daily. You're more likely to catch a cold from a person by shaking their hand than from their sneezes. The human brain weighs about 3 pounds, but uses 20% of one's blood and oxygen. Plaque begins reforming 6 hours after brushing your teeth. (see Human Teeth) If your body temperature was 86 degrees, you could live to be 200. Cold showers actually increase sexual arousal. A Swiss scientist named A. E. Fick invented contact lenses in 1887. There is enough phosphorous inside the human body to make about 250 match heads. Doctors in ancient China were paid when patients were healthy, not sick. The human head weighs eight pounds. The human hand has 27 bones. The human foot has 26 bones. The human body has over 200 bones. 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 Marfan’s syndrome. Some of its symptoms are extremely long bones, curved spine, an arm span that is longer than the person’s 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. A human's small intestine is 6 meters long. The human body is 75% water. 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.
    • • • The strongest bone in your body is the femur (thighbone), and it's hollow! Submitted by AquaGrl 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. The average person has at least seven dreams a night. Your brain is move active and thinks more at night than during the day. • • • • 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. • • • • • • • • 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. The longest bout of hiccups lasted 69 years! You blink your eyes over 10,000,000 a year. Our heart beats around 100, 00 times every day. Our blood is on a 60,000-mile journey. Our eyes can distinguish up to one million colour surfaces and take in more information than the largest telescope known to man. Our lungs inhale over two million liters of air every day, without even thinking. They are large enough to cover a tennis court. Our hearing is so sensitive it can distinguish between hundreds of thousands of different sounds. Our sense of touch is more refined than any device ever created. Our brain is more complex than the most powerful computer and has over 100 billion nerve cells. We give birth to 100 billion red cells every day. When we touch something, we send a message to our brain at 124 mph. We have over 600 muscles. We exercise at least 30 muscles when we smile. We are about 70 percent water. We make one litre of saliva a day. Our nose is our personal air-conditioning system: it warms cold air, cools hot air and filters impurities. 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. We have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and silicon in our bodies. A human being loses an average of 40 to 100 strands of hair a day. A cough releases an explosive charge of air that moves at speeds up to 60 mph. Every time you lick a stamp, you're consuming 1/10 of a calorie. A fetus acquires fingerprints at the age of three months. A sneeze can exceed the speed of 100 mph. Every person has a unique tongue print. According to German researchers, the risk of heart attack is higher on Monday than any other day of the week. • • • • • • • • • • • • • • • • • • • • • • • • •
    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • After spending hours working at a computer display, look at a blank piece of white paper. It will probably appear pink. An average human drinks about 16,000 gallons of water in a lifetime. A fingernail or toenail takes about 6 months to grow from base to tip. An average human scalp has 100,000 hairs. It takes 17 muscles to smile and 43 to frown. Babies are born with 300 bones, but by adulthood we have only 206 in our bodies. 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. By age sixty, most people have lost half of their taste buds. By the time you turn 70, your heart will have beat some two-and-a-half billion times (figuring on an average of 70 beats per minute.) Each square inch of human skin consists of twenty feet of blood vessels. Every human spent about half an hour as a single cell. Every person has a unique tongue print. Every square inch of the human body has an average of 32 million bacteria on it. Fingernails grow faster than toenails. 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. The right lung is slightly larger than the left. Hairs in the nose help to clean the air we breathe as well as warming it. The highest recorded "sneezes speed" is 165 km per hour. The surface area of the lungs is roughly the same size as a tennis court. The capillaries in the lungs would extend 1,600 kilometers if placed end to end. We lose half a litre of water a day through breathing. This is the water vapour we see when we breathe onto glass. A person at rest usually breathes between 12 and 15 times a minute. The breathing rate is faster in children and women than in men. The smallest bones in the body are found in the ear. The longest bone in the body is the femur. The bones are filled with a fatty substance called bone marrow. In this marrow, red and white blood cells are manufactured and then released into the bloodstream. Over half the body's bones are in the hands and feet. The only joint less bone in your body is the hyoid bone in your throat. As your bones grow, you get taller (of course). Your growth in height is likely to stop by the time you are 16 if you're a girl and 18 if you're a boy. The heart beats around 3 billion times in the averages person's life. About 8 million blood cells die in the human body every second, and the same number are born each second. Within a tiny droplet of blood, there are some 5 million red blood cells. It takes about 20 seconds for a red blood cell to circle the whole body. Red blood cells make approximately 250,000 round trips of the body before returning to the bone marrow, where they were born, to die. Red blood cells may live for about 4 months circulating throughout the body, feeding the 60 trillion other body cells. We eat about 500kg of food per year. 1.7 liters of saliva is produced each day. The esophagus is approximately 25cm long. Muscles contract in waves to move the food down the esophagus. This means that food would get to a person's stomach, even if they were standing on their head. An adult's stomach can hold approximately 1.5 liters of material. Every day 11.5 liters of digested food, liquids and digestive juices flow through the digestive system, but only 100 mls is lost in feces.
    • • In the mouth, food is either cooled or warmed to a more suitable temperature Interesting Facts about the Brain • • • • • • • • • • • • • • • Your brain uses 20% of your body's energy, but it makes up only 2% of your body's weight. Your cerebral cortex is about as thick as a tongue depressor. It grows thicker as you learn and use it. Your brain is about 1300-1400 cubic centimeters in volume, about the size of a cantaloupe and wrinkled like a walnut. The brain feels like a ripe avocado and looks pink because of the blood flowing through it. Your brain generates 25 watts of power while you're awake---enough to illuminate a lighbulb. A newborn baby's brain grows almost 3 times in course of first year Humans have the most complex brain of any animal on earth Your brain is divided into two sides. The left side of your brain controls the right side of your body; and, the right side of your brain controls the left side of your body. Toxins in commonplace items such as carpeting and shower curtains may be contributing to memory loss over time? Overexposure to aluminum compounds—in foil, cookware, deodorants, antacids, toothpaste— can affect brain function Lavender can help you sleep A cooked potato can jump-start your brain when you're feeling foggy The essential oil of jasmine can quickly restore mental alertness Eating foods rich in vitamin E, beta-carotene, and vitamin C may help lower your risk of Alzheimer's disease Certain prescription and nonprescription drugs may dramatically affect your ability to concentrate • A shoulder-blade is not connected to any other bones – it is fixed in a body with the help of 15 muscles • A human being is quite a mysterious and unique creature. Humans have never been able to reproduce many organs, cells and tissues in technical versions – appliances or mechanisms. Facts and figures of the human anatomy still strike imagination despite the up-to-date level of scientific development. The length of all blood vessels in a human body reaches about 100,000 kilometers. Tiniest vessels – capillaries – are not more than four micrometers in diameter. The amount of blood in a human organism is not constant, although it does not exceed seven or ten liters. This is definitely not enough to fill all blood vessels. Furthermore, red corpuscles are about seven micrometers in diameter, which makes it hard to imagine how they manage to flow along 4micrometer capillaries. Everything is normal from the point of view of physiology, though. Not all vessels are filled with blood. Some organs usually receive higher blood nutrition than others, depending on the extent of their activity. The digestion system is very busy after dinner, which requires a very intensive blood supply. The normal work of the brain is hindered with a lack of blood in this case – that is why people feel sleepy after eating. A red corpuscle is a living cell that possesses a very elastic membrane. It simply stretches out to be able to go through smallest vessels. A human body consists of a quadrillion of cells. A skeleton is formed with 206 bones. The shinbone is capable of standing the axial load of 1600-1800 kilos (the weight of a car). It is also the longest bone of the skeleton – it reaches about 27 percent of a person's height. The tiniest bones of a human being form the hearing-aid – they weigh only 0.05 grams. A shoulder-blade is not connected to any other bones – it is fixed in a body with the help of 15 muscles. Fifty percent of a bone is made of water. A human being stops growing as he or she turns 24 years of age. The growth of a young individual slows down a little at night time, but returns to the normal speed in the daytime. There are over 600 muscles in a human body. Jaw-muscles on cheek teeth may develop an effort of 72 kilos. • • •
    • • • • • • • • • • • • • • • • • • • • • • • • The weight of an average human brain is about 1300-1400g - @ 3lbs i.e., almost one bag of sugar. It's smaller than an elephant's brain (6000g) but bigger than a monkey's brain (95g)! A dog's brain weighs about 72g and a cat's brain weighs abut 30g. Your skin weighs twice as much as your brain! The brain represents about 2% of your total body weight. It is roughly 140mm wide, 167mm long and 93mm high neurons multiply at a rate 250,000 neurons per minute during early pregnancy Information travels at different speeds within different types of neurons. Transmission can be as slow as 0.5 meters/sec or as fast as 120 meters/sec. Traveling at 120 meters/sec is the same as going 268 miles/hour your brain consists of 60% white matter and 40% grey matter The human brain is approximately 75% water Brain uses approximately 20% of the total oxygen pumping around your body! ...and about 750ml of blood pumps through your brain every minute! Brain consists of about 100 billion neurons! That's about 166 times the number of people on the planet! It would take you approximately 3,171 years to count them all! When you were born, your brain weighed about 350-400g and you had almost all the brain cells you will ever have. In fact, your brain was closer to its full adult size than any other organ in your body! And......that your brain stopped growing at age 18 the number of internal thought pathways that your brain is capable of producing is: One followed by 10.5 million kilometers of standard typewritten zero's! A human body synthesizes about 100 grams of proteins during one hour. The brain of an adult male weighs 1375 grams, whereas the female brain weighs 1275 grams. The weight of the brain does not affect intellectual capacities of a person. Only four percent of brain cells work; the rest of them are kept in reserve. About a thousand of neurons die every hour. The speed of a nerve impulse on the reflex arch can reach 120 meters a second. Mixed food usually stays in the stomach of an adult person for about six hours. The stomach usually produces about 1.5 liters of digestive juices on daily basis. The total square of the absorbing surface of the small intestine villi makes up to six square meters. A healthy liver processes 720 liters of blood every day. A human eye contains 110-130 million of receptors that are responsible for the perception of light, whereas only 5-7 million of receptors are responsible for the color perception. An eye is capable of distinguishing 130-250 pure color tones and up to ten million of mixed shades. An eye cannot perceive a motionless image: eyes move even when an individual looks at one and the same spot. The bronchial tree has 24 levels of embranchment. The total number of air vesicles (alveoli) in lungs reaches 300-350 million. The total square of the respiratory surface of two adult lungs is more than 90 square meters. The share of skin-breathing makes up about three or five percent of the entire respiratory system. It may reach 30 percent under extreme conditions. The average lifespan of a spermatozoon is about 36 hours; an ovule lives for 12-24 hours. The total distance that spermatozoa have to cover during ejaculation is about 6.3-7.8 meters. Male sex glands start functioning at the age of seven. A male body is somatically and sexually mature when a young man turns 16-19 years of age. The psychological maturity, however, comes at 21. A woman produces about 400 follicles in a lifetime (13 follicles a year). The duration of a woman's menstrual cycle may fluctuate from 21 to 32 days. The total number of thermal receptors in human skin may reach about 280 thousand. The minimum quantity of painful receptors is located in the area of cheeks.
    • EYE. • • • • • • • • • • • • • • • • • • • • • • • • • • Are the most complex organs you possess except for your brain? Are composed of more than two million working parts. Can process 36,000 bits of information every hour. Under the right conditions, can discern the light of a candle at a distance of 14 miles. Under the right conditions, can discern the light of a candle at a distance of 14 miles. Contribute towards 85% of your total knowledge. Utilize 65% of all the pathways to the brain. Can instantaneously set in motion hundreds of muscles and organs in your body. In a normal life-span, will bring you almost 24 million images of the world around you. The external muscles that move the eyes are the strongest muscles in the human body for the job that they have to do. They are 100 times more powerful than they need to be. The adult eyeball measures about 1 inch (2.5 cm) in diameter. Of its total surface area only one-sixth is exposed -- the front portion. The eye is the only part of the human body that can function at 100% ability at any moment, day or night, without rest. Your eyelids need rest, the external muscles of your eyes need rest, the lubrication of your eyes requires replenishment, but your eyes themselves "never" need rest. But please rest them! Ever notice how many times your eyes blink? Probably not, because we blink so fast. The average person blinks about 12 times a minute. That's an amazing 10,080 blinks in a kid’s day (14 waking hours). That's why when someone says "it happened in the blink of an eye," they mean it happened really fast. How far can an eagle see? A lot further than the human eye can see. An eagle can see a rabbit about 1 mile or 1760 yards away. Now the average person needs to be about 550 yards away to see the same rabbit. That's why when someone says "you must have eagle eyes," they mean you can see really far. Does being color blind mean you only see in black and white? Not exactly. People who are color blind just can't see things in as many colors as people who have normal vision, and they cannot see certain colors like red, green, and some blues. Not all color-blind people see colors the same way, either. That's why when someone says "you must be color blind," they mean you didn't pick out your colors too well. One out of every 2,000 newborn infants has a tooth when they are born. After the first trimester, a fetus has fingerprints. They will be unique only to him or her for their entire life. Fingernails and toenails can grow from the base to the point within 6 months. Some people’s nails grow faster than others. Toenails grow slower than fingernails. It is not true that fingernails, toenails and hair continue to grow after we die. They do appear longer because when we die, we dehydrate and the skin pulls away. This causes nails and hair to look longer. The average person expels flatulence 14 times each day. Humans lose 40 to 100 strands of hair every day of their lives. A sneeze travels at a rate in excess of 100 miles per hour. If a person goes without sleep for 10 days, they will die. They will die sooner from lack of sleep than they will from starvation. Monday is the day of the week when the risk of heart attack is greatest. A blood cell can make a complete circuit of the human body in about 60 seconds.
    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • There are 20 feet of blood vessels in each square inch of human skin. Each human spends a half hour as a single cell when it is first conceived. 600,000 particles of skin are shed every hour by humans. This averages 1.5 pounds annually. If you live to age 70, you have shed 105 pounds of dead skin. It takes 43 facial muscles to frown and only 17 to smile. So keep on smiling. Your body has enough iron in it to make a nail 3 inches long. If you want to lessen stress hormones and make your immune system stronger, all you have to do is laugh. Remember, laughter is the best medicine on Earth. The average human brain has about 100 billion nerve cells. Nerve impulses to and from the brain travel as fast as 170 miles (274 km) per hour. The thyroid cartilage is more commonly known as the Adams apple. The only joint less bone in your body is the hyoid bone in your throat It's impossible to sneeze with your eyes open. Your stomach needs to produce a new layer of mucus every two weeks or it would digest itself. It takes the interaction of 72 different muscles to produce human speech. The average life of a taste bud is 10 days. The average cough comes out of your mouth at 60 miles (96.5 km) per hour. Relative to size, the strongest muscle in the body is the tongue. Human thigh bones are stronger than concrete. When you sneeze, all your bodily functions stop even your heart. Babies are born without knee caps. They don't appear until the child reaches 2-6 years of age. Children grow faster in the springtime. It takes the stomach an hour to break down cow milk. Women blink nearly twice as much as men. Blondes have more hair than dark-haired people do. There are 10 human body parts that are only 3 letters long (eye hip arm leg ear toe jaw rib lip gum). If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth. The average human head weighs about 8 pounds. Our eyes are always the same size from birth, but our nose and ears never stop growing. In the average lifetime, a person will walk the equivalent of 5 times around the equator. An average human scalp has 100,000 hairs. The length of the finger dictates how fast the fingernail grows. Therefore, the nail on your middle finger grows the fastest, and on average, your toenails grow twice as slow as your fingernails. The average human blinks their eyes 6,205,000 times each year. The entire length of all the eyelashes shed by a human in their life is over 98 feet (30 m). Your skull is made up of 29 different bones. Your ears and nose continue to grow throughout your entire life. After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death. Hair is made from the same substance as fingernails. The average surface of the human intestine is 656 square feet (200 m). A healthy adult can draw in about 200 to 300 cubic inches (3.3 to 4.9 liters) of air at a single breath, but at rest only about 5% of this volume is used. The surface of the human skin is 6.5 square feet (2m). 15 million blood cells are destroyed in the human body every second. The pancreas produces Insulin. The most sensitive cluster of nerves is at the base of the spine. The human body is comprised of 80% water. The average human will shed 40 pounds of skin in a lifetime.
    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Every year about 98% of the atoms in your body are replaced. The human heart creates enough pressure to squirt blood 30 feet (9 m). You were born with 300 bones. When you get to be an adult, you have 206. Human thighbones are stronger than concrete. Every human spent about half an hour as a single cell. There are 45 miles (72 km) of nerves in the skin of a human being. The average human heart will beat 3,000 million times in its lifetime and pump 48 million gallons of blood. Each square inch (2.5 cm) of human skin consists of 20 feet (6 m) of blood vessels. During a 24-hour period, the average human will breathe 23,040 times. Human blood travels 60,000 miles (96,540 km) per day on its journey through the body. We have almost 10,000 taste buds inside our mouths; even on the roofs of our mouths. Insects have the most highly developed sense of taste. They have taste Organs on their feet, antennae, and mouthparts. Fish can taste with their fins and tail as well as their mouth. In general, girls have more taste buds than boys. Taste is the weakest of the five senses.” The average human adult body has an astounding 5 million hairs of which 100,000 to 150,000 are on the scalp. True blondes have more hair on the scalp - 140,000 hairs than brunettes (105,000 hairs) or redheads (90,000 hairs). Hair is made up of a protein called Keratin. Keratin is also a constituent of our nails. Hair around the world Hair color and texture differ around the world. Asians have jet-black hair whereas Scandinavians have varying shades of browns and reds to the pale blonde. There are generally three racial groups with three types of hair. Oriental - People from Japan and China have straight and black hair. Caucasoid - This group is varied and a mixture of several racial groups. The hair colors range from black to blonde. The hair can be wavy or straight. African - African people have black hair that is tightly curled. It is woolly and dry. Heat or chemicals can easily damage this type of hair. Hair structure Some part of hair is hidden under the skin, while the rest is seen outside the body. The part of hair hidden under the skin is the hair follicle. There are tiny blood vessels at the base of the follicle that provides nutrition to the hair. Sebaceous glands secrete sebum that keeps the hair shiny and waterproof to some extent. At the root of the hair follicle is the papilla, which is where the hair grows. Hair follicles are formed when the baby is still in the womb. After birth, there is no new growth of hair follicles. The hair strand itself consists of three layers. The outermost layer called the cuticle is thin. The middle layer called the cortex is thick. The cortex provides the hair its strength, color and determines whether hair will be wavy or straight Hair Growth The hair grows at the rate of 12 millimeters every month. Hair grows the best between 10 AM to 11 AM and again between 4 PM to 6 PM. It is also generally known that hair grows faster in summer than winter. Hair grows the best between the ages of 15 to 30 and slows down from the age of 40 onwards. Both genders start natural hair loss in 50s. Hair rejuvenation takes place on a daily basis. Hair grows and sheds. You normally shed 50 to 100 hairs per day. Any loss above that or visible patches of baldness are a cause for worry and can be classified as hair loss. The human ear can distinguish between hundreds of thousands of different sounds.