Facts about Human body

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Microscopic Level Much of what takes place in our bodies happens at a level that we simply can’t see with the n***d eye. These facts will show you that sometimes that might be for the best. Click to buy NOW! PDF-XCHANGE www.docu-track.com Click to buy NOW! PDF-XCHANGE www.docu-track.com 81. About 32 million bacteria call every inch of your skin home. Germaphobes don’t need to worry however, as a majority of these are entirely harmless and some are even helpful in maintaining a healthy body. 82. Humans shed and regrow outer skin cells about every 27 days. Skin protects your delicate internal organs from the elements and as such, dries and flakes off completely about once a month so that it can maintain its strength. Chances are that last month’s skin is still hanging around your house in the form of the dust on your bookshelf or under the couch. 83. Three hundred million cells die in the human body every minute. While that sounds like a lot, it’s really just a small fraction of the cells that are in the human body. Estimates have placed the total number of cells in the body at 10-50 trillion so you can afford to lose a few hundred million without a hitch. 84. Humans shed about 600,000 particles of skin every hour. You may not think much about losing skin if yours isn’t dry or flaky or peeling from a sunburn, but your skin is constantly renewing itself and shedding dead cells. 85. Every day an adult body produces 300 billion new cells. Your body not only needs energy to keep your organs up and running but also to constantly repair and build new cells to form the building blocks of your body itself. 86. Every tongue print is unique. If you’re planning on committing a crime, don’t think you’ll get away with leaving a tongue print behind. Each tongue is different and yours could be unique enough to finger you as the culprit. 87. Your body has enough iron in it to make a nail 3 inches long. Anyone who has ever tasted blood knows that it has a slightly metallic taste. This is due to the high levels of iron in the blood. If you were to take all of this iron out of the body, you’d have enough to make a small nail and very severe anemia. 88. The most common blood type in the world is Type O. Blood banks find it valuable as it can be given to those with both type A and B blood. The rarest blood type, A-H or Bombay blood due to the location of its discovery, has been found in less than hundred people since it was discovered. 89. Human lips have a reddish color because of the great concentration of tiny capillaries just below the skin. The blood in these capillaries is normally highly oxygenated and therefore quite red. This explains why the lips appear pale when a person is anemic or has lost a great deal of blood. It also explains why the lips turn blue in very cold weather. Cold causes the capillaries to constrict, and the blood loses oxygen and changes to a darker color. Miscellaneous Here are a few things you might not have known about all different parts of your anatomy. 90. The colder the room you sleep in, the better the chances are that you’ll have a bad dream. It isn’t entirely clear to scientists why this is the case, but if you are opposed to having nightmares you might want to keep yourself a little toastier at night. 91. Tears and mucus contain an enzyme (lysozyme) that breaks down the cell wall of many bacteria. This is to your advantage, as the mucus that lines your nose and throat, Click to buy NOW! PDF-XCHANGE www.docu-track.com Click to buy NOW! PDF-XCHANGE www.docu-track.com as well as the tears that wet your eyes are helping to prevent bacteria from infecting those areas and making you sick. 92. Your body gives off enough heat in 30 minutes to bring half a gallon of water to a boil. If you’ve seen the Matrix you are aware of the energy potentially generated by the human body. Our bodies expend a large amount of calories keeping us at a steady 98.6 degrees, enough to boil water or even cook pasta. 93. Your ears secrete more earwax when you are afraid than when you aren’t. The chemicals and hormones released when you are afraid could be having unseen effects on your body in the form of earwax. Studies have suggested that fear causes the ears to produce more of the sticky substance, though the reasons are not yet clear. 94. It is not possible to tickle yourself. Even the most ticklish among us do not have the ability to tickle ourselves. The reason behind this is that your brain predicts the tickle from information it already has, like how your fingers are moving. Because it knows and can feel where the tickle is coming from, your brain doesn’t respond in the same way as it would if someone else was doing the tickling. 95. The width of your armspan stretched out is the length of your whole body. While not exact down to the last millimeter, your armspan is a pretty good estimator of your height. 96. Humans are the only animals to produce emotional tears. In the animal world, humans are the biggest crybabies, being the only animals who cry because they’ve had a bad day, lost a loved one, or just don’t feel good. 97. Right-handed people live, on average, nine years longer than left-handed people do. This doesn’t have a genetic basis, but is largely due to the fact that a majority of the machines and tools we use on a daily basis are designed for those who are right handed, making them somewhat dangerous for lefties to use and resulting in thousands of accidents and deaths each year. 98. Women burn fat more slowly than men, by a rate of about 50 calories a day. Most men have a much easier time burning fat than women. Women, because of their reproductive role, generally require a higher basic body fat proportion than men, and as a result their bodies don’t get rid of excess fat at the same rate as men. 99. Koalas and primates are the only animals with unique fingerprints. Humans, apes and koalas are unique in the animal kingdom due to the tiny prints on the fingers of their hands. Studies on primates have suggested that even cloned individuals have unique fingerprints. 100. The indentation in the middle of the area between the nose and the upper lip has a name. It is called the philtrum. Scientists have yet to figure out what purpose this indentation serves, though the ancient Greeks thought it to be one of the most erogenous places on the body

100 Facts Human Body

100 Facts Human Body is a fantastic illustrated children's book, taking an in-depth look at the human body for 7-10 year olds. Children can discover how blood circulates, the amazing complexities of the brain and how the senses work. Exactly 100 numbered facts will challenge readers, acting as an incentive as they make their way through the book. Packed with artwork, diagrams and photographs, plus panels containing activities, quizzes and cartoons, 100 Facts is the ideal introduction to this fascinating topic. Topics covered: Babies, The growing body, Skin, Hair and nails, Bones and skeleton, Joints, Muscles, Lungs and breathing, The digestive system, Heart and blood, Senses, The nervous system, The brain, Healthy body.

Fun Facts about Different Parts and Organ Systems of the Human Body

Here are the most interesting, fun and amazing facts on the Human Body:

Interesting Facts on Human Brain

Brain surgeries are being carried out since the Stone Age.

About 75 per cent of the brain is made up of water.

The human brain grows three times its size in the first year of life.

Headaches are the results of a chemical reaction in your brain combined with the muscles and nerves of your neck and head.

Our brain has approximately one hundred billion neurons.

Good Cholesterol is key to learning and memory.

Information runs between neurons in our brain at the fastest speed of 250 mph.

Dreams are a combination of imagination, physiological factors, and neurological factors.

The brain can’t feel pain.

When you eat or drink something that’s cold, it leads to sphenopalatine ganglion neuralgia called brain freeze. It results when blood vessels and arteries in the very back of the throat and the ones that take blood to your brain constrict when they’re cold. This causes headaches.

By the late 20s, the human brain begins to lose some memory abilities and some cognitive skills.

The human brain gets smaller as our age increases.

Egyptians would usually pull out the brains through the nose, during the mummification process.

Traumatic events can affect the brain’s ability to remember details.

The brain uses 20% of the oxygen and blood in your body.

Also, check Neurons: Structure, Types & Diagram here.

Amazing Facts on Human Nervous System

There are more nerve cells in the human brain than there are stars in the Milky Way.

If all the neurons in our body are lined they would go around 965 km long.

Our brain has 100 billion neurons alone and there are about 13 500,00 neurons in the human spinal cord.

A newborn baby’s brain grows to as much as triple its size during the periods of its first year.

The left side of the human brain is responsible for controlling the right side of the body and the right side of the brain is responsible for controlling the left side of the body.

A newborn human baby loses about half of its nerve cells before it is born.

The nervous system can transmit nerve impulses as fast as 100 meters per second

The human male’s brain has 6.5 times more grey matter compared to female brains, but a female brain has 10 times more white matter compared to a male’s brain.

Potassium and sodium ions are essential for the brain to function normally.

The diameter of the neurons can range between 4 to 100 microns.

As our age increases, the brain loses a gram each year.

At a given point in time, only four per cent of the cells in the brain are active, the rest are kept in reserve.

There are 43 different pairs of nerves that connect the central nervous system (CNS) to every part of the rest of the body. 12 of the nerve pairs are connected to the brain, while the remaining 31 are connected to the spinal cord.

Read about Human Brain, Parts of Forebrain, Midbrain, Hindbrain here.

Scientific Facts About Human Heart

The average size of the heart is the size of our fist.

Heart beats approximately 1,15,000 times and it pumps about 2,000 gallons each day.

The cardiac conduction system is the biological electrical system that controls all the processes of the heart.

The first open-heart surgery was performed by Daniel Hale Williams in 1893.

Arne Larsson, who received the first implantable pacemaker in 1958, lived longer than the heart surgeon and died at 86 of a disease that was unrelated to his heart.

The youngest person to receive a successful heart surgery was a one-minute old baby girl.

A wasp called the fairy fly has the smallest heart while whales have the largest heart.

Most heart attacks happen on a Monday.

Christmas is the most common day of the year for heart attacks to happen.

An average human heart weighs less than 1 pound.

The size of the heart in human males is 2 ounces heavier than in females.

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