amazing facts about the human body | 22 Words

How much do you really know about the way your body works? Once high school biology comes and goes, most of us have a decent idea--but there are some things that just don't come up in sophomore bio! And that's unfortunate because there are some insanely amazing facts about the human body that just pass us by! We don't often--or ever--think about every moving part that makes our bodies work, but many of them have some surprising stories to read about.

So check out these fascinating facts about the human body, as provided by Reddit! You won't believe the little things that your body is capable of, without you ever knowing.

Keep scrolling to learn some of the coolest facts about the human body you were never taught in school! These fun facts about the human body will offer you a new perspective on your very being. These interesting facts about the human body just might change your worldview!

Your eyes are (relatively) safe.

maxillary bone behind eyeball

via: Getty

The bone that supports your eyeball, called the orbital floor, is paper-thin and has a large empty cavity, called the maxillary sinus, on the opposite side. When you get hit hard in the eyeball, instead of your eyeball itself rupturing, the bone underneath your eye breaks, which is called an orbital floor fracture. This releases the pressure from the impact and saves your eyeball.

If you crush a beachball against a concrete wall, you can pop it, but if you try to crush it against a styrofoam wall, the wall breaks but the beachball is fine. An amazing evolutionary adaptation to protect your eyesight.


What an amazing fun fact about the human body. Who would have known the eye was capable of withstanding such immense pressure?

Another amazing fact about the human body for the biology books.

This woman shouldn't have been able to move.

operating table

via: Getty

Really late but I discovered this thing during my thesis.

We were researching patients with neurological problems and people who had brain injuries and we found a woman in her 30 that had had part of her brain removed. More specifically the area that activates when you move your body.

Well she was moving and talking with just some minor missteps and theoretically it was not possible, she was paralyzed in the first 3 months after the operation (she was caught in a car accident if I remember correctly).


But brains are insanely powerful, so...

human brain scan activity

via: Getty

We were trying out a new scanner for the brain and we found out that an area of the brain that wasn't supposed to work and control the movement was doing just that. The occipital area (usually controls the vision) was now working as a motor control area.

The brain is really amazing...

This interesting fact about the human body tells you more about your own brain then you need to know!


Did you know?

potassium explosion

via: Getty

You have enough potassium in your body to create a very small bomb.


Uh...yikes? Suddenly I feel even more flammable than before. This is a really cool fact about the human body, and probably helped encourage those spontaneous combustion conspiracy theories!

There's such a thing as too many ribs.

x-ray of human skeleton

via: Getty

Some people are born with extra ribs called cervical ribs which grow from the C7 vertebrae in the neck. It's a weird and rare mutation that a lot of people don't even know they have, although it is also a cause of thoracic outlet syndrome, which is where pressure is applied to the nerves, veins, and arteries running into the arms. It can be really painful, and in some rare cases can cause gangrene in the arms. If left untreated it can kill you if you're really unlucky. (source: I have the non-cervical rib induced variety).


While this is an amazing and cool fact about the human body, I sure hope I don't have any extra ribs lurking in my skeleton!

Some people have this reflex and don't even realize it's a thing.

Some people will cough if they put something in one ear, a very small percentage will cough if something is in either ear. It is called Arnold's ear-cough reflex.


Fun facts about the human body are what we live for. I knew there was a connection from all those wet willies from my childhood and coughing fits!

We have sensitive noses, but only sometimes!

sprouting plant in the rain

via: Getty

You know the smell of rain, or disturbed soil? It's a compound produced by bacteria called Geosmin, and the human nose is extremely sensitive to it. We can smell it at as low a concentration as 5 parts per trillion.


No wonder we have such flashes of nostalgia and intense memory experiences when we smell fresh earth.

This fun fact about the human body is another reason to give gardening a second change! Go ahead and get your hands dirty, because this cool fact about the human body will make for an intense sniffing experience.

Which organ has mad regeneration powers?

human liver x-ray

via: Getty

Your liver can regenerate, and much faster than you think. I had a quarter of my liver removed, and a month later it was back.


This is the closest we'll ever get to regenerating a tail like lizards, or claws like crabs. This fun fact about the human body tempts me to play with my own liver and see if it grows back...

Bad idea, right?

Another example of the brain's adaptive abilities:

different parts of the human brain

via: Getty

A woman was found without a cerebellum, the part of the brain that controls motor abilities of the body. She is alive and has no real side effects from this condition that we know of.

She was born without a cerebellum, and the medical professionals (not me) found out after she complained about a headache which lead to an MRI.


The brain is the most advanced of all human organs. We will never truly know all the amazing facts about the human brain, but we learn more interesting developments every day!

There's a reflex associated with swimming.

swimming in a pool

via: Getty

The dive reflex. When your face is submerged in chilled water and you hold your breath it causes your heart rate to lower and blood supply to be increased to vital organs such as the heart and brain. This is useful to help increase the amount of time you can hold your breath, but is also useful in helping to manage PSVT (paroxysmal super ventricular tachycardia) which is characterized by occasional bouts of high heart rate.


Breath control can vastly affect your heart rate. It's an amazing and cool fact about the human body that we can regulate our moods and adrenaline through proper breath control.

In through your nose, out through your mouth. Hold, exhale slowly, and repeat!

This fun fact about the human body can help you calm down in moments of intense pressure, or whenever you face occasional bouts of a racing heart.

Do YOU have this muscle?

palmaris longus muscle

via: Getty

There is a muscle, called palmaris longus, in the forearm missing in about 10% of the population. You can easily test if you have it by putting your pinky and thumb together while holding your palm facing up and flex the hand upwards. If 1 tendon is standing out more than the others that's palmaris longus.


Do we know the meaning behind why some people have this muscle and others don't? Research is still pending, but it's still a pretty amazing fact that certain people walk around with muscles that others don't have.

Interesting stuff about the human body. Who would've thought?

Mind-blowing info from an archaeologist!

archaeologist brushing a human skull in the dirt

via: Getty

Archaeologist here. You can give birth after you've died. Occasionally we will come across a really confronting burial where the skeleton of an unborn child is halfway through its mothers pelvis. Generally what happens is the woman has died before giving birth and after burial a build up of gasses from decomposition forces the baby out. We refer to this as "coffin birth".


This is truly disturbing, but nonetheless an amazing feature of the human body. This phenomenon suggests a striving for live even under the most unendurable of circumstances.

Natural redheads need more novocaine!

red hair blowing in the wind

via: Getty

Natural redheads require increased doses of anesthesia, due to some connection with the mutated melanocortin-1 receptor. I'm a natural redhead myself, and developed a fear of dentists because I'd always feel what they were doing!

Eventually, I had an issue that couldn't be ignored and had to find a new dentist. At my first visit, he took one look at me, and said: “You're a real redhead, huh?" “Yup." “(Hygienist), get me 4x the novocaine!" I knew I'd found my man, and he's been treating me ever since... also shed my fears since dental work is much less unpleasant when you're actually numb before they start.


Redheads needing a higher dosage of novocaine to achieve a similar effect is one amazing fact about the human body that has been perplexing oral surgeons for decades.

If your hair is red, strap yourself in a for a bumpy root canal, because your need for novocaine is an incredible fact about the human body that should be common knowledge!

Evolution is absolutely wild:

evolution graphic from fish to man

via: Getty

There's a small fishing village/tribe in Asia where the fisherman have evolved to be able to hold their breath for around 10 minutes while hunting underwater.


The most impressive fact of the human body is its ability to adapt to circumstances that threaten the species' survival. These fisherman are practically fish themselves! An astonishing and amazing fact about the human body that needs to be shared.

We could all be fish people if we wanted to, it just takes practice!

And here I always thought it was abnormal for one nostril to feel blocked constantly!

man with a blocked nostril

via: Getty

You mostly breathe out of one nostril at a time, and the 'dominant' nostril switches every hour or so.


I never figured that my sinus troubles were because of the human body's amazing ability to filter the air we breathe. Amazing facts about the human body continue to astonish us with each new discovery!

Looks like the planet and its inhabitants are a little out of sync!

planet earth as viewed from outer space

via: Getty

The optimal human circadian rhythm is actually closer to 25 hours than 24 [in experiments depriving people of sunlight & other triggers that maintain your circadian rhythm].


Does this mean we're naturally evolved for living on Mars? Cool! I've always had a soft spot for the Red Planet. Is that another amazing fact about the human body, or is it just me?

Some people just...don't need much sleep, and I'm jealous.

lady sleeping with a sleep mask in bed

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A small percentage of people are "Super Sleepers" and are fully recharged after 2 to 4 hours of sleep each night. They get to burn the candle at both ends!


While this interesting feature of the human body sounds fun in theory, in practice I would probably go insane. But then again, the human body is so exemplary and adaptive that I would most likely find some amazing way to not go insane. Cheers to biology!

Your thumb has a name.

thumbs up

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Scientific name for your thumb is “Pollex" and your big toe is “Hallux".

Not just yours, everybody’s.


Your body is always fighting!

white blood cells fighting infection

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The war that's constantly happening inside of you.

Everyone knows about your immune system but the sheer complexity of it is amazing. Like, your body has neutrophils which are like the generic white blood cell that constantly goes around your blood vessels seeking out foreign objects, but did you know there are cells called macrophages which are like way better neutrophils in the fact that neutrophils mostly swallow bacteria to kill them, macrophages do this too except they can swallow close to 100.


Yet another amazing fact about the human body!

Come flu season, your body is ready.

You have stuff like dendritic cells whose main goal is to be an early warning system, they swallow an invader then carry a piece of it back to T cells to activate them. Once they're activated, T cells swarm that specific invader and kill anything that has that antigen.

I didn't even name close to all of the cells that are doing constant battle inside of you 24/7 365 days a year. So next time you have the flu or an infection, think of the little guys inside you who gladly fight the good fight.


Know how you always sleep lighter away from home?

camping by the river

via: Getty

When were in an unfamiliar environment we sleep with half our brain at a time kinda like sharks and that's why we wake up easier.


Light sleeping away from home evolved from our need to stay safe and alert while navigating or exploring new areas to settle. Early humans were constantly on the move and adapting to new circumstances.

This cool fact about the human body reinforces how industrious our species is at survival - even on vacation!

According to some parts of the body, your eyes don't exist.

Different colored eyes

via: Getty

Eye immune privilege: Your immune system doesn't know your eyes exist. There's a chance that if you get an eye injury or an infection near your eyes the immune system will think your eyes are a foreign body and you'll go blind.


This explains random acts of blindness. I wonder what the human body thinks those two things in our eye sockets are then? Weird, strange, and once again, and amazing fact about the human body.

Babies should watch their knees!

baby without fully grown knees

via: Getty

Babies are born without kneecaps, they develop around 2 years. They have a cartilage-like thing that protects the knees in the meantime.


No wonder babies can scurry on their knees so easily - they're not there! If an adult tried to scuttle across the floor with the same gusto as a toddler, they would need knee replacement surgery before the end of the week.

Babies not having knees is a fun fact about the human body you should share with expecting parents, in case they weren't aware.

Hands and feet are BONY.

group of hands together

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Your hands and feet alone account for more than half of all the bones in your body (106/206).


Crack your knuckles and remind yourself how much is going on in there. It's a lot, but nonetheless an amazing asset of human evolution and a particularly useful set of bones to have.

DNA is more mixed than you'd think!

DNA strand

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Apparently some peoples in Asia have a bunch of DNA from Denisovans -- another hominid people coexisted and interbred with.


Other humanoids scrambled out of Africa before the modern DNA strands, and evidence of their heritage still exists today. An amazing fact about the human body is its ability to pass down its lineage despite outside interference from competing DNA strands.

This world has superhumans, basically!

Oh, that isn't the half of it. Some Nepalese have retained a Denisovan gene that causes their hemoglobin to function differently. This allows women to survive childbirth at extremely high altitudes. (Non-Nepalese women, basically, cannot survive childbirth at high altitude.)

They are, for all intents and purposes, super-human.


It's like having two brains in one head:

woman undergoing a brain scan procedure

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Cutting the corpus callosum ( connects two brain hemispheres) can produce some freaky results. Such as your hand doing stuff that your conscious mind isn't aware of, writing a sentence or scratching an itch without knowing for instance.


I could've sworn that this has happened to me on more than one occasion. Especially after a long night out at the bar. Haven't we all done many things our conscious mind wasn't aware of at the time?

An amazing and fun fact about the human mind is how it controls your body without you being conscious of it. When that connection breaks down, it opens the floodgates to pure neurological pandemonium. Let's hope we never have to go there!

We don't think about it a lot, but human vitality is impressive.

man getting a shot

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Vitality. You'd be surprised how much blood you can lose and fully recover reasonably quickly.


We are blood banks for ourselves at the end of the day. Impressive, resourceful, and above all productive. We produce more blood a day than you'd expect!

This interesting fact about the human body is why blood donations are so prevalent.

That's...a lot of soap.

Bar of soap on the sink

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The human body contains enough fat to make seven bars of soap.


If you ever run out of soap, you know where to find it...

About to exercise? Your body is more ready than you think.

lacing up the sneakers

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Your heart rate increases about a minute before partaking in exercise. It is known as the anticipatory rise and happens involuntarily.


Ever felt nervous before staring a big run? This interesting fact about the human body is our way to prepare for anticipated stressors. Just amazing. On your marks, get set, GO!

Germaphones won't love this.

petri dish

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We are, by cell numbers, more bacteria than human. -sandysanBAR

Here's what sunburn REALLY is.

sunscreen applied to a sunburn

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When we get sunburn, that's not the heat of the sun that's hurting us most of the time, but it's little skin cells killing themselves to protect us from skin cancer.

Not so cool if I think about it.


SPF 3000, anyone?

We all have hidden strengths...

We have an internal regulator that prevents us from using our full strength. Or muscles usually only work at about 60% max of what we are capable of.

In extreme life and death situations these regulators stop and we are able to use our full strength. This is where stories of people tipping over cars and similar come from.

These regulators are because at full strengh we heavily damage our bodies. Essentially, you could lift something to the point where it is either lifted or your arm just breaks instead. I believe there has also been someone who ran so hard his leg broke.


Note to self: measure height in the mornings only.

kid measuring their height against the wall

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You're taller in the morning than the rest of the day/night.

During the day the cartilage in our knees and other areas slowly compress, but when you go to sleep and rest the cartilage goes back to normal. On average we are about 1cm taller the morning than in the evening.


The human body is capable of amazing things when confronted with differences in gravitational pull.

Gotta keep procreating, I guess!

pregnant women in class

via: Getty

Women are actually programmed to forget the pain of childbirth after a few months or so. If this didn’t happen, most women would only end up having one child, which would eventually lower the population. -Sqwoopy Share these amazing facts with your friends!