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The human body is a complex and beautiful machine where everything has a purpose and a reason to be, but it is so complex that sometimes it confuses even the most qualified specialists like doctors and scientists. Many bizarre questions may come up when thinking about it like for example, how long does a hair live for?

Today, I will try to answer this question and much more you probably haven't even thought through a list with 50 fascinating and interesting facts about our body and some of its mysteries.

No Blood Supply

bnet

Did you know the only part of the body that has no blood supply is the cornea of the eye? It receives oxygen directly from the air. How interesting is that?

Some Numbers

gstatic

The average human body contains enough sulfur to kill all the average fleas on a dog, enough carbon to make almost 1000 pencils, enough potassium to fire a toy cannon, enough fat to make 7 bars of soap and enough water to fill a 50-liter barrel.

2 in 1

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The human skull is made up of 29 different bones. Nerve impulses sent from the brain move at a speed of 274 km/h without receiving any fine or any other penalty for speeding.

Brain Calling

scitechconnect

The average human brain generates more electrical impulses in a day than all the mobile phones of the world combined. In the 1960s this wouldn't have been such an interesting fact.

Blood

youtube

The human heart pumps 182 million liters of blood during the average lifetime. By the way, blood donation means life donation so, you know, why not donate some life?

Funeral Arrangements

elementarium

While you read this sentence over 70 cells in your body died and were replaced by new ones. Rest in peace little pieces of you, we will forever miss you.

Heartbeats

steamuserimages

Did you know a woman's heart beat faster than men's? Don't worry, I won't make any sexist joke about it, it just a plain fact. Seriously, I won't. I promise.

About Hiccups

bloximages

Once, a man hiccuped for 68 complete years. This hero's name was Charles Osborne. Nobody knows exactly why hiccups exist in the first place, but they are as annoying as something can be.

Some Generalities

linkidiot

Right-handed people tend to live around nine years longer than left-handed people. The average person forgets 90% of their dreams. On average, a person's respiration rate is one third higher in spring than in autumn.

Blushing

microfilenetwork

When you blush, your stomach also turns red. Seriously, if you happen to blush run to the bathroom or somewhere else where you can find some privacy and check it by yourself.

About Water

4ever

Thirst occurs when water loss is equal to 1% of your body weight. More than 5% of loss can cause fainting, and more than 10% cause death from dehydration. Drink water. I bet you're thirsty right now.

But why?

vixendaily

Did you know the average four-year-old child asks 450 questions a day? I'm pretty sure my little brother at least doubles that amount. I think he might even triple it.

About Sleeping

977rock

On average, a person needs around seven minutes to fall asleep. My girlfriend hates me because I only need 10 seconds and she always ends up talking to herself.

Koalas

jayckieed

Not only human beings, but also koalas have unique fingerprints. Now I need a koala to not only check if this is true but because they are just too cute!

Brush your teeth

huffpost

All parts of the human body have the capability of healing themselves with the only exception of teeth. That's the main reason why you should always keep your teeth healthy, kids.

Don’t Play With your Food

rd

Right-handed people chew most of their food on the right side of their mouth, whereas left-handed people do so on the left. Why? Well, I have no idea, but it seems logical.

I’m Going Bananas!

listenlearnmusic

Did you know the fragrance of apples and bananas can help a person lose some weight? Why? Well, smelling these neutral sweet scents can curb our appetite, therefore, we eat less.

Kilometrical Hair

blogspot

If we don't cut our hair regularly, its average length would be around the 725 kilometers! Washing that amount would take like forever not to mention combing it. I get tired just of thinking of it.

I’m so Sorry

indianexpress

You may have heard about this one before. If you haven't I want to apologize for the upcoming nightmares. During their lifetime, a person will on average accidentally swallow eight small spiders.

Lots of Bacteria

cnbc

The total weight of the bacteria in the human body is 2 kg so I will start not counting those 2 kgs whenever I have to answer how much I weight.

Jawbreaker

old-assets

The total strength of masticatory muscles on one side of your jaw is equal to 195 kilograms. I will start weightlifting with my jaws then since they are much stronger than my skinny arms.

Kissing Bacteria

purch

A person passes on 278 different types of bacteria to another person when they kiss them. Fortunately, we only need to worry about 5% of it. Of all the existing bacteria only 1% can result in the human body becoming ill.

Now Kiss

rd

If you kiss another person for a certain amount of time, it is much more effective in terms of hygiene than chewing gum as it normalizes the level of acidity in your oral cavities.

Don’t Try this at Home

centurionsigns

You can lose 150 calories per hour if you hit your head against the wall. Don't do it though, regular exercise is much more rewarding and beneficial. Seriously, don't try this.

Straight Lines

imgur

Did you know human beings are the only animals which can draw straight lines? Well, I'm 100% sure I'm not a human being then since I was never able to draw a straight line in my whole life.

3x1

firmoo

Human skin is completely replaced about 1,000 times during a person's lifetime. Women blink almost two times less often than men. Only 7% of people are left-handed.

About Smoking

mirror

A person who smokes a pack of cigarettes a day is doing the equivalent of drinking half a cup of tar a year. It's official, I quit smoking. Ok, I admit it, I never smoked in the first place.

Now Kiss Again

washingtonpost

A passionate kiss causes the same chemical reactions in the brain that skydiving and firing a gun do. I swear I'm not making this stuff up, it's all scientifically proven.

Short Fact

oneindia

Men are officially classified as dwarves if their height is below 1.3 m, whereas for women the measure is 1.2 m. I'm sorry if this hurts your feelings but there's nothing wrong with being short.

Literally Short Facts

naildesigncode

Fingernails grow about four times faster than your toenails. People with blue eyes are more sensitive to pain than others. There are more than 100 different viruses which cause a cold.

Let’s Play some Tennis

pulmonaryhypertensionnews

The surface area of the human lungs is approximately equal to the area of a tennis court. Are you for a tennis match? I'm no Roger Federer but I'll try my best.

One Last Kiss

toiimg

During a person's lifetime, they spend about 2 weeks kissing. That's not so much now that I think about it. People should kiss more. Why? Because it's awesome, that's why.

More About Cells

emaze

At birth, there are 14 billion cells in the human brain. After 25 years, the number of cells falls by over 100,000 every day. After 50 years neurons (that is, nerve cells) shrink and the brain gets smaller.

Bones (not a reference to the tv series)

bonesdefinitionandstuff

At birth, a child's body is made up of around 300 bones. But an adult has just 206. That is one of the reasons why kids seem to be indestructible and can play, jump, run and fall without any consequences.

Small Intestine

slidesharecdn

During a person's lifetime, the small intestine is about 2.5 meters. After they die, the muscles in the walls of their intestine relax, and its length increases to 6 meters. Is it weird that I want to jump rope now?

More Literally Short Facts

cbsnews1

The smallest cells in a man's body are sperm cells. Your right lung can take in more air than your left. Each of us has around 2,000 taste buds. Now, breathe.

Random Facts

coavision

The human eye can distinguish 10 million different colours. Each of us has around 2,000 taste buds. Children grow faster in the spring. Bones are about 5 times stronger than steel.

Dark vs Blonde

youtube

The facial hair of a blonde-haired man grows faster than that of a man with dark hair. Being a dark-haired Viking demanded more time than a blonde one then. Yes, that's the conclusion I reached.

More Random Facts

sbs

Ingrown toenails are hereditary. It is impossible to sneeze with your eyes open. Please, if you try that last one, make sure to record yourself and submit a video. I'm sure your face will be hilarious!

About Saliva

blogspot

The average human produces enough quarts of saliva in a lifetime to fill two swimming pools. That would be two warm-water swimming pool. Now that I pictured that I'm a bit disgusted.

Nerve Cells

pinterest

There are so many nerve cells in a human brain that it would take almost 3 thousand years to count them. I can't imagine why someone would want to do that, it sounds more like a made-up punishment for kids. "Steve, go count your nerve cells t your room! And no TV!"

Heart Beats

thefactspeak

A human heart beats over 3 billion times during an average human lifespan. Counting heartbeats would also make a great punishment, don't you think? I think I'm not ready to have children.

Acid

builtlean

Did you know the acid in your stomach is strong enough to dissolve zinc? The only reason why it doesn't destroy the stomach is that the stomach walls constantly renews itself.

Baby Eyes

di

This is a cool one. Babies are born with blue eyes more than any other color because melanin in their eyes takes some time to be fully darkened by ultraviolet light to reveal the eye's true color.

Don’t Try this at Home II

northwesternrec

It is impossible to kill yourself by choking yourself with your hands. Once again just trust me on this one, don't test it yourself. Please, I insist. Just don't do it.

Human Feet

optimizeottawa

The human feet have 500,000 sweat glands and can produce more than a pint of sweat a day. Excuse me as I go to the bathroom, I need to throw up.

Cool Facts

gofortricks

If the human eye was a digital camera it would have 576 megapixels. Your heartbeat changes and mimics the music you are listening to. Your brains continue its development until you are in your late 40s.

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