• 4 months ago
Chaque minute, votre cœur pompe environ 5 litres et demi de sang pour assurer le bon fonctionnement de votre organisme. Votre corps se débarrasse également d'environ 30 000 cellules mortes afin de faire de la place pour de nouvelles cellules. Votre cerveau émet des millions de signaux électriques qui vous aident à penser, à bouger et à ressentir. Vous respirez entre 12 et 20 fois, ce qui vous permet d'absorber de l'oxygène et de vous débarrasser du dioxyde de carbone. Enfin, vos cellules créent et utilisent de l'énergie, ce qui vous permet de rester en forme toute la journée ! Animation créée par Sympa.
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Category

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Fun
Transcript
00:00You know, when your nose is blocked and you think how much breathing is generally easy and the most natural thing in the world,
00:06our body makes a lot of effort for us to be comfortable on a daily basis.
00:10So, in a spirit of gratitude, let's examine some of these amazing things that the human body does every minute.
00:18Let's start with our eyes. They constantly transmit a multitude of visual information to the brain.
00:24The cornea acts as an entrance door, skillfully curving the light.
00:28The iris, the colored part, adjusts the dose of light and the crystalline concentrates the rest on the retina.
00:34The latter then transforms all this light into electrical signals, which are sent to the brain to be interpreted.
00:40This seems a lot, but all this work is actually done in a few milliseconds.
00:46In a single minute, our brain processes about 600 million bits of visual data.
00:54More than half of our body is made up of water.
00:5655% if you are a woman and 65% if you are a man, to be precise.
01:02To ensure that this balance is always respected,
01:05our body is equipped with a hydration controller that permanently monitors the amount of water we lose.
01:10For example, by sweating or even by breathing.
01:13If we lack even 1% of our amount of water, we start to get thirsty.
01:18We would not be there either without these hearts beating in our chests.
01:22Yes, we all have a single heart.
01:24The speed at which they pump can vary depending on your physical shape, your feelings, your height,
01:31and even vary if you are doing a yoga pose that requires a little effort.
01:35On average, doctors estimate that adults have between 60 and 100 heartbeats per minute when they are at rest.
01:43However, the more you are in shape, the less you ask for your heart,
01:46and you can even end up with a very, very low heart rate.
01:5140 beats per minute.
01:52At each small beat of this organ, 70 milliliters of blood are sent into your body.
01:57If your heart rate at rest is 80 beats per minute,
02:01your heart expels 5.6 liters of blood every 60 seconds.
02:07Have you ever wondered how fast your body recovers from a loss of blood?
02:12Our adult body contains an average of 4.7 liters of blood.
02:16When we lose a little, our body starts working hard to replace it.
02:20And it's faster than you can imagine.
02:22In the space of 24 hours, the volume lost is reconstituted.
02:26And in a few weeks, we are like new.
02:29Indeed, every second, our body makes a few 2 million new red blood cells,
02:34that is 120 million per minute.
02:37As for white blood cells and platelets, the process is even faster.
02:41Our respiratory system is also fascinating.
02:44For adults, the number of normal breaths is about 12 to 20 per minute.
02:50As for infants, they have a faster rhythm of 30 to 60 breaths per minute.
02:55When you breathe in air, it requires the effort of a whole part of your body.
03:00The command center of your brain sends signals to your diaphragm to ask it to flatten.
03:06Your ribs and abdominal muscles adjust to allow your chest to expand
03:12and suck the air into your lungs.
03:13Breathing is a little easier.
03:15The used air is expelled by your elastic lungs.
03:19But when you make a little more effort,
03:21your abdominals help you a little more in the exhalation process.
03:26As for reading, our brain is capable of quite extraordinary wonders.
03:32It can reach up to 1000 words per minute.
03:34If you do the math, it means that your brain can read a book of 300 pages in just two and a half hours.
03:41Interesting fact, this real reading machine does not necessarily work in a straight line.
03:47Indeed, our eyes make movements called saccades.
03:51It is a quick jump through the text, from front to back.
03:55It is sometimes a big leap, sometimes a small jump.
03:59It helps us to quickly assimilate tons of information,
04:03and the phenomenon occurs several times per second.
04:06The importance of the leap depends on our ability to read
04:09and our degree of familiarity with the subject.
04:12Do you want to know more about subjects as varied as science, pop culture or history?
04:18Do not forget to press the subscribe button
04:21to stay informed of our latest videos.
04:26Our skin is our largest organ,
04:28and it is constantly changing about 30,000 cells every 60 seconds.
04:33Most of the time, we do not even notice that our face and body
04:38are constantly getting rid of certain layers.
04:41Yes, a large part of this dust that hangs around your house is you.
04:45It takes a month for these new skin cells to appear on the surface,
04:50and this process accelerates or slows down with age.
04:53At sixty, or even later,
04:55the renewal of the cells can take up to eight weeks,
04:58and this accumulation of skin gives your skin a slightly dull look.
05:03Fortunately, there are many products today,
05:06such as moisturizing creams and serums,
05:08that can help fight dry skin.
05:10You cannot speak without your tongue.
05:13Well, technically, you can,
05:15but most people will not understand a word of what you say.
05:19Every day, our tongue works with our lips and teeth
05:22to transform the sounds of the throat into words that make sense.
05:26The tongue itself is flexible and fast,
05:29able to pronounce more than 90 words per minute,
05:32using more than 20 movements for this.
05:35Although we can vocalize without using our tongue,
05:38we need it to pronounce consonants such as
05:40T, D, L and R.
05:43Or, if you're a pirate,
05:45Arar.
05:47It is thanks to this important organ that parrots can imitate us so easily,
05:51even if most of them have no idea what they are saying.
05:55These birds have a thick tongue, and,
05:58although it is less mobile,
06:00it allows them to imitate human speech with great precision.
06:04So pay attention to what you say in their presence.
06:10Humans blink 15 to 20 times per minute.
06:13It may seem little,
06:15but it means that we spend about 10% of our watch time with our eyes closed.
06:20For a long time, scientists have believed that these blinkings had only one purpose,
06:24to keep our eyes moist.
06:25This is why we produce tears,
06:28which, with our eyelids, come to protect our ocular globes,
06:32avoiding painful blinks.
06:34But we blink for other reasons too.
06:37A recent study has shown that when we blink,
06:40our brain presses a mini reset button.
06:44It deactivates some functions related to vision and attention.
06:48And since attention disturbs our perception of time,
06:51blinkings are a bit like the way our brain travels through time.
06:55Or mini-naps, if you prefer.
06:58On average, we have between 35 and 48 thoughts per minute.
07:02It depends on a number of things,
07:04such as what we have experienced,
07:06what we feel,
07:07and even where we are.
07:09As for the formation of thoughts,
07:11we know that brain cells can communicate.
07:14But understanding exactly how our ideas arise in our mind
07:18remains a bit mysterious.
07:20Our brain has a large number of neurons,
07:23these fascinating cells,
07:25which emit an electric charge to communicate with each other.
07:29These neurons release chemical substances,
07:32neurotransmitters.
07:34They are like passing notes,
07:36they create electrical signals.
07:38And when these signals pass through thousands of neurons,
07:41like a wave,
07:42thoughts arise in our head.
07:47Every time you blink,
07:49you feed this electrical power plant, your body.
07:54A single calorie from your diet
07:56represents about 4,200 units of energy,
07:59called joules.
08:01If you eat 2,000 calories a day,
08:03you transform them into nearly 6,000 joules per minute.
08:06This is how things happen.
08:08When you eat,
08:09food passes from your mouth to your stomach
08:12and ends up in very small pieces
08:14in your blood circulation.
08:16Imagine tiny delivery trucks
08:18transporting oxygen
08:20and other useful substances to your cells.
08:23Once inside,
08:24these cells contain mini factories
08:26called mitochondria.
08:28They are responsible for transforming these deliveries
08:30into adenosine triphosphate,
08:32or ATP.
08:34This is the energy exchange currency of our cells.
08:37It is used to make other cells,
08:40help us move,
08:42and even send messages to other cells
08:44through electrical impulses.
08:47Thinking about it,
08:48I want to be nicer to my body
08:50for everything it does.
08:52And you?
08:53What do you think?

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