• 5 months ago
Préparez-vous à être ébahis par des faits incroyables sur le corps humain que vous ne soupçonniez pas ! Des yeux bizarres à un corps humain lumineux, cette vidéo vous laissera ébahis et avec une envie d'en voir encore plus. Ne manquez pas de découvrir les secrets du corps humain ! Appuyez sur play maintenant et préparez-vous à être émerveillé ! Animation créée par Sympa.
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Transcript
00:00Look at this. There are people who can bend their little finger without bending their ring finger.
00:05But most find it difficult, or even impossible to accomplish.
00:10When they move their middle finger or their little finger, they tend to slightly bend their ring finger as well.
00:16Yes, for me too it is the case.
00:18The luxation of the eyeball is an extremely rare condition that allows some people to bring their eyes out of their orbits.
00:25Unfortunately, this ability has disadvantages.
00:29It can lead to many eye problems.
00:32Some indigenous peoples, such as the Tibetans, can survive at altitudes as high as those of Mount Everest.
00:39This rare aptitude is very likely to have appeared after years of evolution.
00:44The ancestors of modern Tibetans lived in high altitudes for thousands of years.
00:49And their red blood cells have adapted as a consequence,
00:52making it possible to survive with dangerously low oxygen levels.
00:56The Bajos are sea nomads living in Southeast Asia.
01:00These individuals have developed an extra-large rat serving as a blood cell deposit, rich in oxygen.
01:06Thanks to this, they can easily spend 5 to 10 minutes fishing underwater without going back to the surface to breathe,
01:13if only once.
01:15About 14% of the population is devoid of long-palmar muscles.
01:20Poor old man.
01:21It is in fact a rudimentary part of the body, and the need for it has disappeared during our evolutionary process.
01:28So, if you do not have this muscle, do not worry.
01:32Its absence does not affect the functioning of your forearm in any way.
01:36About 5 to 37% of people have been deprived of wisdom teeth since their birth.
01:42These teeth are no longer really necessary today.
01:45They were important for our ancestors, because they helped them to chew hard foods like nuts, roots and raw meat.
01:53And the caramels soft with the salt of Guérande.
01:56No, there I invent.
01:58But as most of the food we eat today is transformed, wisdom teeth are no longer just a simple atavism.
02:05Most people have only one spiral of hair implantation, which goes in the direction of needles and a watch.
02:11But 5 people out of 100 have a double crown.
02:14And if the two spirals are directed in the opposite direction of the needles and a watch, it makes the person even more unique.
02:21Some scientists think there is a genetic link between the direction of this spiral and our right hand.
02:27A little more than 8% of right-handed people have a spiral going in the opposite direction of the needles and a watch.
02:34But in left-handed people, this number goes up to 45%.
02:38The brain of the man ages faster than that of the woman.
02:42With age, men begin to complain more and more often of memory problems and lack of concentration.
02:48At the same time, women do not have such serious problems with their memory, but they feel more often depressed.
02:55Which one would you choose?
02:57When a person lies, his own nose betrays him.
03:00Psychologists at the University of Grenade discovered that when a person told a lie,
03:05the temperature around his nose and in the inner corners of his eyes increased.
03:10This phenomenon was called, surprise surprise, the Pinocchio effect.
03:15The Japanese have specific bacteria, the plebeian bacteroides, in their intestines.
03:21These bacteria help them digest sushi.
03:23The Japanese have been eating raw algae for centuries.
03:27The microorganisms present on the surface of these algae have entered their bodies and have actively developed.
03:33Today, these bacteria help the Japanese to digest raw food and prevent various problems related to their diet.
03:41Humans would have as many hairs on their bodies as chimpanzees.
03:44The number of hairs of an individual and a chimpanzee is approximately the same.
03:49The only difference is that human body hair is essentially useless and so thin that it is almost impossible to distinguish.
03:56Humans do not have more genes than other species.
03:59In fact, people have even less genes than an ostrich.
04:02Tomatoes also have a lot more genes than you and me.
04:05But we are creatures so complex.
04:08Well, recently, scientists have concluded that the number of genes contained in a genome
04:13was not closely related to the complexity of a living being.
04:16Let's take a break to breathe a little.
04:19And speaking of that, your left lung is made up of two lobes,
04:23while your right lung is divided into three parts.
04:26In addition, the left lung is a little smaller, because it must leave room for your heart.
04:32Your lungs also contain about 2,400 km of respiratory tract.
04:37It is more than half the distance between New York and Los Angeles.
04:41There are also more than 300 million alveoli in your lungs, which are small airbags in the form of balloons.
04:47People have five senses, among the most obvious.
04:51Sight, smell, touch, hearing and taste.
04:55But that's not all.
04:57What about thermosensation, the sense of heat?
05:00Or nociception, the perception of pain?
05:03Or even awareness of one's own body, proprioception?
05:08To understand what it is about, close your eyes and touch your nose.
05:12Did you succeed?
05:14It's thanks to proprioception.
05:17This list can be much longer.
05:19Some experts claim that people have 21 to 53 senses.
05:24Your fingers become all shriveled up after spending too much time in the water.
05:28The shriveled fingers are caused by the shrinking of your blood vessels.
05:32When you stay in the water for a long time, your nervous system makes your capillaries retract.
05:37Your body removes the blood from this area, and this loss of blood makes your vessels narrower.
05:43The skin begins to fold back around them, forming these funny wrinkles.
05:47Scientists think that this process would help us to have a better grip when our hands and feet are wet.
05:54There are three kinds of cones in the eyes of an ordinary person.
05:57These cones help to recognize colors in blue, red and green spectra.
06:03Thanks to them, most people can distinguish about a million different shades.
06:10Imagine this.
06:11If someone managed to unroll all the DNA contained in the human body,
06:15it would extend over about 16 billion kilometers.
06:18Do the math.
06:20That's twice the distance from Earth to Pluto.
06:22And it's not the only incredible thing our body is capable of.
06:26Trillions of nerve connections constantly feed your memory.
06:30According to some studies, after watching 2,500 images for only 3 seconds,
06:35most people will remember these images with an accuracy rate of 92%.
06:40Incredible.
06:42Your body shines, emitting tiny amounts of barely visible light.
06:46This glow is the product of biochemical reactions that have their seat in your body.
06:51The light increases and decreases throughout the day.
06:54Although it is not visible, you cannot detect it with the naked eye.
06:58Bacteria represent between 0.5 and 2.7 kilos of your total body weight.
07:04And between 100 million and 1 billion bacteria can live on one of your teeth.
07:09It is impossible to perceive the taste of food without saliva.
07:13Indeed, the chemical substances contained in food must be dissolved in the saliva
07:17before being detected by the taste buds.
07:20It may sound like a myth, but eating too many carrots can actually make your skin orange.
07:26Carrots contain large amounts of beta-carotene.
07:29This compound can cause what is called carotenemia.
07:33If you have too much of it in your blood, it sticks to the parts of your body where the skin is thickest.
07:38On the plant of the feet, on the knees, elbows, palms, and even on certain areas around the nose.
07:44But do not worry, it is not dangerous.
07:47You can easily reverse this phenomenon by reducing your consumption of food rich in beta-carotene.
07:53The muscles of the chin, whose scientific name is chin muscle, have a rather bizarre aspect.
07:59We don't really know what to think about it.
08:01Look at these 16 strange little tentacles.
08:05However, they allow us all kinds of expressions, making the lips, chin and cheeks play.
08:10And yes, it is they who are at the origin of these wrinkles and these bizarre folds that appear on your chin.
08:17And this is because these muscles pull directly on the skin.
08:22We can live without some of our organs and lead a normal life.
08:26The human body is made up of simple organs and working organs in pairs.
08:30And when you have two, one is actually enough for you to survive.
08:34Your intestinal wall is actually not that small, it is even bigger than you.
08:39It measures about 7 meters.
08:41The cornea, the transparent part of your eyes, is not irrigated by blood.
08:46It is the air that directly provides it with the oxygen it needs.
08:50Humans develop their unique digital footprints very early in their lives,
08:54at the embryonic stage, only three months after conception.
08:57Moreover, even if we seriously damage these digital footprints,
09:00they grow back naturally and find their original design.
09:04The whole world is born with an immersion reflex.
09:07This reflex is activated and interrupts bodily functions in case of drowning or prolonged immersion.
09:12The human brain is not smooth at all.
09:15But if you decide to flatten all the ridges that cover it,
09:18your brain would be the size of a pillowcase.
09:21Not so useful, however.
09:23Newborns blink only once or twice a minute.
09:26As a comparison, an adult person blinks at least ten times during the same period of time.
09:32Our lungs are the only organs capable of floating on water.
09:35The reason is that they are made up of about 300 million alveoli,
09:38small balloon-shaped structures.
09:41In addition, even if we are in perfect health,
09:43our lungs are never totally free of germs or sterile.
09:47Your nose is a superhero.
09:49It is both a heating, a filter and a humidifier.
09:53All this thanks to its corneae, three pairs of bone-wrapped blades.
09:57They contain blood vessels capable of heating the air
10:00and caliciform cells used to humidify it.
10:03In addition, the air you breathe is filtered by your nose
10:06before being sent to your lungs.
10:09Every time you eat something,
10:11your oesophageus, the organ through which the food passes to reach your stomach,
10:15performs a series of undulating contractions that push the food.
10:19This is what we call peristaltism.
10:22There is a link between your digestive system and your brain,
10:25the brain-intestinal axis.
10:27This is why stress or brain problems
10:29can affect the way your body digests food.
10:32Even if hockey is generally harmless
10:34and stops by itself after a few minutes,
10:37it is not really pleasant.
10:39So you should know that it can occur as a result of a temperature change.
10:44The density of your brain increases throughout your life.
10:47All this because new neuronal connections appear.
10:50They also appear because the structure of the brain never ceases to change.
10:55If you do not want to peristaltize, pinch the skin of the ridge of your nose.
10:59Your brain then receives an alarm signal.
11:02Very quickly, it slows down all other processes,
11:05including the reflex to peristaltize.
11:07In fact, studies have shown that peristaltization
11:10is a way for your nose to re-initialize.
11:13The brain re-initializes cells called cells
11:16that cover your nasal cavity.
11:19The part of the brain responsible for the vision
11:21is located at the back of the head.
11:23It is interesting to note that the right side of your brain
11:26controls the vision on the left side and vice versa.
11:30If you are in a noisy place,
11:32in a nightclub or at a concert,
11:34cover your ears and you will hear your friends better.
11:37Push on the tragus, the rounded, skin-covered ridge
11:40just in front of the auditory conduit,
11:42so that it penetrates your ear.
11:44Then turn this ear to your friend.
11:46When a person snores,
11:48the noise usually does not exceed 60 decibels.
11:51This is about the volume of a normal conversation.
11:53But the sound level can sometimes reach 80 decibels.
11:56It is the noise made by a mixer in motion.
12:00Like salamanders that push their tails back,
12:03we would be able to regenerate our cartilage,
12:05the rubbery material that envelops our joints.
12:08Scientists have recently discovered
12:10that the cartilage could repair itself.
12:12This process is apparently effective at the level of the ankle,
12:15ineffective at the level of the knee
12:17and even less effective at the level of the hip.
12:20If a person suffers from anosmia,
12:22also called olfactory cystitis,
12:24it can neither detect nor distinguish odors.
12:28Your eyes do not stop moving when you look at something.
12:31Without that, you could not see the whole picture.
12:34This movement escapes you,
12:36because your brain is an excellent video editor.
12:39It stabilizes the images and all these fragments
12:42in a homogeneous visual flow.
12:45The liver is the only human organ
12:47capable of regenerating completely.
12:49Even if it must regenerate up to 25% of its initial weight,
12:53the organ will find its original size.
12:56Your mouth itches when you gnaw on pineapple,
12:59because while you eat this fruit,
13:01it eats you too, finally, in a way.
13:04Pineapple would be the only food to contain bromelain.
13:07It is an enzyme that breaks down proteins.
13:10Fortunately, our gastric acid knows how to deal with this nasty enzyme.
13:15Bacteria capable of producing electricity live in our intestines.
13:19These bacteria emit electrons,
13:21which creates tiny electric currents.
13:24This may be the way bacteria produce energy.
13:28The impression of déjà vu could actually result
13:30from a lag in the processing of information by the brain.
13:35This lag would occur when our brain transfers information
13:38between different areas.
13:41If there is any delay,
13:43your brain will receive the same information twice.
13:46As a result, it will consider it as an event that has already occurred.
13:51The mutation of the DECTU gene allows some people
13:54to sleep only a few hours while feeling in good shape.
13:57They are not tired and never do the morning fat.
14:00On average, these people wake up at 4 or 5 in the morning.
14:045% of the world's population has this feature.
14:09It happens that your ears open
14:11or hurt you when you travel by plane.
14:13You can solve this problem by chewing a chewing gum.
14:16This opens the stache tube,
14:18a narrow duct that connects your throat to your middle ear.
14:21The opening of this duct
14:23balances the pressure inside the ear
14:25and puts an end to this unpleasant phenomenon.
14:28Chewing also opens the stache tube.
14:31It is possible that your feet get bigger with age,
14:34just like your nose and ears.
14:36As we age,
14:37our feet weaken at the level of ligaments and tendons.
14:40The plantar vault flattens.
14:42The feet become wider and longer.
14:47I don't want to scare you or anything,
14:49but know that every second,
14:51your body creates 25 million new cells.
14:53I'm going to do the math for you.
14:55This means that in about 15 seconds,
14:57you will have produced more cells
14:59than there are people in the United States.
15:01Think about it the next time you feel
15:03you haven't been productive enough.
15:05It may only represent 2% of our body mass,
15:08but our brain absorbs 20% of our blood and oxygen intake.
15:12Our brain can also produce enough energy
15:15to power an electric bulb,
15:17at least when we're awake.
15:19Have you ever wondered what the biggest human organ is?
15:22It's the skin.
15:23And it's on the palm of your hand and the plant of your feet
15:25that it is the thickest.
15:27I know, I know,
15:28I also hate dust,
15:30but you are partly responsible for this film of filth
15:32on your TV screen.
15:34Yes,
15:35human beings lose about 600,000 skin particles in an hour.
15:40And the biggest part of the dust you have at home
15:42is actually composed.
15:44You have a nice layer of it too.
15:47Nowadays,
15:48we consider it more of a beauty mark,
15:50but the reason why people are born with what we call a Cupid's bow
15:53is actually quite fascinating.
15:55As our traits begin to develop even before our birth,
15:58it seems that the Cupid's bow
16:00is actually the place where our face,
16:02well,
16:03closes,
16:04where the right and left sides meet.
16:07For humans,
16:08this may not be so obvious,
16:10but if you look at the muzzle of your dog,
16:12you will see that there is a vertical line,
16:14all straight,
16:15just below the nostrils.
16:16Yes,
16:17dogs also have their Cupid's bow.
16:19Are you born with more water than you have today?
16:22At birth,
16:23we have about 300 bones.
16:25But as we age,
16:26some of them merge.
16:28This is why,
16:29at an adult age,
16:30we end up with about 200 bones.
16:33Although your teeth are mainly part of your skeleton,
16:36they are not really bones.
16:37However, they look like them
16:39and share certain characteristics with them,
16:41such as being the hardest elements of your body.
16:44But why was this idea received?
16:45Mainly because teeth and bones
16:47both contain calcium.
16:49To be a little more precise,
16:51about 99% of our body's calcium
16:53is in our bones and teeth.
16:55The rest is in our blood.
16:57So what differentiates them,
16:59you ask?
17:00Well, it's a question of regeneration
17:02and, of course,
17:03of care.
17:04Your bones can repair and heal themselves,
17:07but your teeth are not able to do so.
17:09That's why we have dentists.
17:11We don't just have unique fingerprints.
17:13Our tongues are too.
17:16Research has shown that
17:17the few 10,000 taste buds that cover it
17:20are arranged according to a unique pattern,
17:22specific to each individual.
17:24About 80% of what you think is the taste of something
17:27is actually its smell.
17:29The combination of taste and smell
17:31is what we call taste.
17:34This is probably because our smell
17:36is about 10,000 times more powerful
17:38than our sense of taste.
17:41The next time you listen to your favorite song,
17:44try to pay attention to the beat of your heart.
17:46Do you hear that?
17:47Yes, it's true.
17:48When you listen to music,
17:50the beats of your heart
17:51synchronize with the rhythm of the song.
17:53And speaking of your heart,
17:55sometimes you wonder
17:56when it's in good health,
17:57it beats on average 75 times per minute.
18:00This means that over a year,
18:02a human heart can pump enough blood
18:04to fill an Olympic swimming pool.
18:07What's even more fascinating
18:08is that if you linked all your blood vessels
18:10end to end,
18:12you'd be able to go around the Earth four times.
18:15But that would really hurt,
18:16so don't try it.
18:18We're the only species on Earth
18:19to have a chin.
18:21This topic is still the subject of debate
18:23in the scientific community,
18:25but one of the reasons seems to be
18:26that the chin would make our jaws stronger.
18:29As humans evolved,
18:31the teeth and muscles of their jaws
18:33became smaller and smaller.
18:35They needed something to help them
18:37increase the power of their jaws.
18:39The transparent part of your eye
18:40is called the cornea,
18:42and it promotes the passage of light.
18:44It's also the only part of your heart
18:46that isn't linked to your blood system.
18:48Why?
18:49Because it's designed to get the oxygen
18:51it needs directly from the surrounding air.
18:54If you removed all the fat
18:56in a healthy human body,
18:58it would be enough to make seven bars of soap.
19:01We also produce enough saliva
19:03during our lifetime
19:04to fill two swimming pools.
19:05So, do we prick a head?
19:08Do you know the amount of food
19:10you ingest during a lifetime?
19:12I'll spare you the calculations.
19:14An average person eats
19:16about 33 tons of food
19:17from birth to death.
19:19What does that make us,
19:20to get an idea?
19:22Well, that's about six elephants.
19:23In peanuts, that's a lot more.
19:25We all carry on average
19:26about 1.8 kilos of bacteria
19:28at any time in our body.
19:31But don't run so fast to the doctor.
19:34Most of these bacteria are actually good for you.
19:37They have specific functions
19:38in the human body.
19:39For example,
19:40for digestion and the immune system.
19:42If you want to get a precise idea
19:44of your size,
19:45make sure you measure yourself in the morning.
19:48Because you're about 1 cm taller
19:50when you wake up.
19:52Believe me, it's not magic.
19:54It's simply because
19:55throughout the day,
19:56the cartilage between the bones
19:58and the spine
19:59crumbles and compresses,
20:01making you smaller
20:02when you go to bed.
20:05We all know
20:06that a kind of energy
20:07circulates in our body.
20:09As a result,
20:10we emit a small amount of light.
20:12It's too weak
20:13for us to be able to see it.
20:15But it's not a lie
20:16to say that right now,
20:17you're literally shining.

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