14 Little-Known But Cool Facts About Your Body


Hey, have I told you that you have an AMAZING
body! No, no, no! I didn’t mean it that way! What I’m saying is, your body is a thing
of wonder! Agh, that didn’t come out right either. Put it this way: the human body does a bunch
of really ccool stuff – check it out with me! 1) People literally shine. While it’s much more apparent in some jellyfish
and other sea creatures, every living being on this planet emits light. Yep, humans included. This effect is called bioluminescence, and
the only difference in our case is that we can’t see this light at all. It’s 1,000 times dimmer than our eyes can
naturally pick up. But if you could look at someone through a
highly sensitive camera in a light-proof room, you’d see it. This light is brighter during the day and
dimmer at night, and the brightest light comes from our faces! 2) We have the best cameras out there, no
wait, IN there. The best camera humanity has been able to
make so far has around 400 megapixels. Guess what, you don’t need it because your
eyes are even better! How does an image quality of 576 megapixels
sound? Yep, that’s how good your vision is. Too bad those pictures get printed on the
back of the eye instead of a piece of paper that you can frame. Still, technology has a lot of catching up
to do! 3) We’re all long-distance runners… partially. The human heart is a small but powerful engine. In one day, it pumps blood so effectively,
that it travels around 12,000 miles to run through every vessel in your body. That’d be like running from coast-to-coast
all the way across the continental US…4 times! Not only that, but if you could stretch all
your blood vessels out in a line, well, you’d be extinct, but the blood vessels would wrap
around the Earth…several times! 4) You have as much hair as a chimp. Um…No offense. The difference between us and our little ape
cousins is not in the quantity of hair at all – that’s the same. It’s all in the quality. We use nicer shampoos, I know! No, it really comes down to the way we evolved
our hair – we needed to sweat more effectively and thus control body heat. Another good thing about our fine dainty hair
– it’s much less likely to harbor parasites. And we look better this way, so it’s a win-win! 5) You cough almost at the speed of sound. Your lungs are capable of forcing air out
of them so hard that it moves almost at the speed of sound. Ok, 1/3 the speed of sound, but still! This is for particularly boisterous coughs
coming from a pretty large set of lungs. Like this. {coughs]. Wow I need some water…Just imagine if it
was a little faster and you created a sonic boom!? Well, don’t count on it – our lungs regulate
the speed. 6) Your body knows when it’s underwater. Gee aren’t bubbles kind of a clue? Nope. It has a special mechanism to manage going
into water. It’s called the diving reflex, and it’s
in almost every kind of mammal, including humans. This reflex redistributes oxygen in your body
by channeling it to your heart and brain. The moment you dive into the water, your body
automatically slows down the heart rate, constricts blood vessels, and releases red blood cells
stored in the spleen. This reflex is also triggered by wetting the
face and especially the nostrils, but it won’t work just from running your hands or feet
under water! Speaking of which… 7) There’s a reason why your hands and feet
get wrinkly in water. It may seem like something that just happens
to your skin if it’s wet, but here’s a curveball fact: people with damaged nerves
in the skin don’t get wrinkly fingers in the water! It turns out that this wrinkling is a purposeful
reaction to water, triggered by the nervous system. We need these wrinkles to achieve a better
grip with wet surfaces. Experiments have proven this too: a person
with these raisin fingers was able to collect more wet marbles than a person with smooth
dry hands. We’re halfway through the list, but don’t
forget that you can always add your own examples of crazy body facts down in the comments! Ok, now for the biggest myth… 8) Forget all about this “we use 10% of
our brains” thing. This myth came from outdated research that
only proposed that we don’t use the full potential of our brain – but it didn’t
say anything about 10%. Today, we know for sure that our brains are
always active, every zone and gland in them are working at any time, even during sleep! See for yourself: if we don’t use 90% of
the brain, then why does it needs around 20% of all our energy? For a mere 10% of activity? I don’t think so! Though, I probably use only about 10% on Monday
mornings… 9) There’s a part of your body that doesn’t
get any blood. Every piece in your body is somehow connected
to the blood supply. It transports all the goods to it and all
the unwanted stuff away from it. Except for one thing – your corneas. The corneas are transparent layers on the
front side of your eyes that are like lenses and shields for the more sensitive parts inside. There are no blood vessels in them – they
get everything they need thanks to the tear ducts and direct contact with oxygen in the
air. That’s why it’s so important to keep your
eyes moist and let them rest every once in a while. 10) Your ears and nose don’t stop growing. Somewhere around age 21, our bodies stop growing. No matter how hard you wanted to become an
NBA star, at 21, your fate is sealed. It wouldn’t be like that if basketball stars
needed big ears and noses, though, because those things grow your whole life! This happens because they’re made of cartilage. Unlike bones, that stuff can’t heal itself
naturally, but it grows bigger to cover micro-wounds. This, and the fact that gravity affects cartilage
more obviously than other parts of our body, making it grow ever so slightly with each
year. 11) A woman’s brain shrinks during pregnancy,
but that’s a good thing! Yeah, it gets a bit smaller during this time,
but smaller isn’t always worse. There are zones in our brain that are responsible
for feelings and nonverbal communication. When a woman is pregnant, these zones go through
a complete overhaul. They get physically smaller, but only because
they change their structure to become more focused, efficient, and in-line with the ultimate
goal – the birth of a child. Basically, this shrinking is a sign of the
brain’s swift development, and not otherwise. 12) Babies have many more bones than adults. While a grown person has 206 bones, a newborn
baby has around 300 of them! Their bones aren’t entirely formed or fused
together when they’re born. Most are fractured into different pieces but
linked by a more elastic material – that cartilage stuff I just mentioned. With time, as the baby grows, the bones will
become hard and merge with each other. 13) Half of all the strength in your hand
comes from the pinkie. It’s our fancy opposable thumbs that make
us human, and without the index and middle finger, our hands would be pretty much useless,
right? Well, don’t underestimate that little pinkie
hanging out on the sidelines! Your little finger teams up with the middle
one to provide strength. Without the pinkie, your grip would be much
weaker. It also provides control to an all-wrist movement,
like when you’re working with some kind of a tool. 14) Teeth aren’t naturally white. Yeah, brace yourself for this one. Human teeth are covered by a unique substance
called enamel. It’s the hardest thing a living being can
possibly have. It’s harder than steel, yet it’s still
quite brittle, so don’t get any ideas here. And another thing about tooth enamel – it
isn’t white. It’s cloudy transparent with a tinge of
blue. The color we see is because of the second
layer that’ beneath the enamel – dentin. And it’s yellow. Just don’t take this as an excuse to not
take care of your teeth. Hygiene is still king! Wait a minute. Enamel is cloudy with a tinge of blue? Hmm, Bluetooth? Just sayin’. If you learned something new today, then give
the video a like and share it with a friend! And here are some other cool videos I think
you’ll enjoy. Just click to the left or right, and stay
on the Bright Side of life!

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