Well...... here are 17 facts you may........... or may not want to know .......... i did ......... and they are okay could be better ........ could be worse.......i mean ......hey fuck!!!!!!! ......as long as you have your junk........... and shit .....everything is fine ......i made it this far ...........
17 Wild Facts About The Human Body That I Absolutely Promise You Never Learned In School (Possibly Even Medical School)
The human body is absolutely wild. Although remarkable medical and scientific advancements have occurred in recent decades, we continue to learn more about our bodies every day...
That's why when Redditor u/wassim_elia asked, "What's an interesting fact about the human body that a lot of people don't know?" thousands of people shared the weirdest, wildest, and wackiest human body info, and trust me, you didn't learn this in school. Without further ado, here are 17 of their most surprising facts:
If you have any little-known facts about the human body, feel free to share them in the comments or use this anonymous form!
1. "You know how people with schizophrenia tend to hear voices? It turns out that if someone who was born deaf and taught sign language later develops schizophrenia, the 'voices' present as visions of disembodied hands signing at them."
"Also, people who are born blind apparently never develop schizophrenia."
2. "You can actually smell your lungs while breathing, but your brain ignores it."
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3. "Your tattoo ink is held in place by an army of living immune cells (macrophages) that don't know what to do with it."
"As they age and die, new guys come to the front line to hold the ink in place."
4. "Studies have shown that trauma can be inherited through markers on a person's genome that persist over multiple generations, meaning psychological trauma can be passed down through genetics."
"For example, if your grandparent experienced a traumatic event in early childhood and lacked the appropriate support system, the trauma they hold from this event can be passed to their child, which in turn can be passed to you."
5. "The mammalian diving reflex enables babies to open their eyes and hold their breath underwater."
"When I took my baby to a swimming class at our local pool, we basically threw the baby in the swimming pool, and the reflex took over. The baby held her breath, just as she had in utero, with no panic at all. I couldn't believe it at first.
It's probably what you are seeing on the cover of Nirvana's Nevermind."
6. "Saliva is derived from blood, which is why when you're nervous or anxious, your mouth tends to get dry. This is because blood is rerouted to more essential functions, like your muscles and heart, in times of stress, rather than producing saliva."
7. "Certain non-cancerous tumors (dermoid cysts) can grow their own hair, teeth, eyes, bone, and muscles."
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"Early in my pregnancy, a cyst was found on my ovary. We couldn't do anything about it until I gave birth, so we scheduled surgery to remove it shortly after I had my son.
Apparently, the pregnancy hormones fueled its growth, and that little dermoid cyst was 9.5 inches long by the time we removed it. It was full of teeth, hair, and even a fingernail."
8. "If you put on special glasses that turn your vision upside-down, after a few days of wearing them, your brain will 'correct' your vision back to right-side up."
"At that point, without the glasses, your 'normal' vision is upside down and takes a few hours to go back."
9. "A person with ovaries is born with all of the eggs they will ever produce. This means that when their mother was a fetus, the egg that would someday become that person was carried in their maternal grandmother’s womb."
"I adored my maternal grandmother and was extremely close to her. Knowing that she carried and nurtured part of me is such a beautiful thought."
10. "If you ever need a kidney transplant, an old kidney is not removed; the third one is simply added in."
"They don't put it in the same place, either! The tissue that supports the kidney isn't strong enough to withstand surgery and maintain its position.
Kidney replacement typically places the new kidney lower, on the upper end of the hip bone, to utilize the bone as reinforcement. I would assume this is why removal of the old kidney is unnecessary."
11. "Every human has something called 'anal sampling,' or rectoanal inhibitory reflex, it's when the nerves in and around your lower GI tract/rectum have to distinguish between flatus (farts) and feces."
"Without this reflex, you would never know if you were going to fart or poop your pants, which would make for some high-stakes gas passing."
12. "Humans can glow. It's called ultra-weak bioluminescence or bio-photon emission. It's caused by chemical reactions in your cells, but the light is so weak it's not noticeable to the naked eye."
"Technically, it can be caught with special equipment if you were to sit still for hours in a completely dark room."
13. "The palmaris longus is the tendon that runs from the wrist down your arm. It is a vestigial tendon from when our ancestors used to climb trees, since it's not used anymore, humans are evolving them out, which is why some people have them and others don't."
"I have also recently found that this is the same with wisdom teeth. I only have one, and the dentist has told me that they are not used as much as they were by our ancestors; humans are evolving beyond them. Thus, you have some people with no wisdom teeth or only one."
14. "Your liver can regenerate, and up to two-thirds of a liver is taken during a living donor transplant."
"It takes approximately six to eight weeks for the donor’s liver to regrow to its normal size and function.
The piece of liver that is transplanted will also grow to fit the recipient’s body."
15. "Dental issues can be a precursor to a heart attack. The mouth contains different bacteria from those found inside the body. If a dental infection (or any mouth bacteria) enters the bloodstream through inflamed gums, it can travel to the heart and cause infective endocarditis."
"If not treated quickly, it can damage or destroy the valves. That’s why some people have to take antibiotics before dental procedures."
16. "Located in the cochlea in your inner ear, there are about 16,000 hairs called stereocillia. About 3,500 of them are primarily responsible for your ability to hear. If you lost all 3,500 hairs, you would be deaf. If you lose a substantial amount of those hairs, your hearing will be reduced. Loud sounds, like machinery, explosions, cars, bikes, and amplified music, destroy those hairs."
"There isn't really a 'may harm' or 'might damage' concept; instead, the degree of damage done when these loud sounds impact the hairs in the cochlea is considered.
Once damaged, these hairs never grow back. You have around 3,500, and that is all you will have in your entire life. The more you lose, the worse your hearing will be — forever."
17. "Although we have one of the weakest bite forces compared to other species, our jaws are strong enough to bite through finger joints."
"However, we have psychological mechanisms in place so that we don't bite off our own fingers."
18. "The 'my life flashed before my eyes' occurrence is basically your brain running through a list of scenarios you've encountered previously to find something similar so you know what to do in the situation you're currently in."
"It's basically your mind trying to find a similar instinct in a matter of seconds — fight, flight, or freeze."
19. "Pineapples contain bromelain, an enzyme that breaks down proteins. When you eat fresh pineapple, this enzyme works on the proteins in your mouth's protective layer."
"Thus, the pineapple thinks your tongue is meat and starts breaking it down, which is why it tingles and feels odd."
20. "Your stomach develops a brand new lining every couple of days. That’s your body basically saying, 'Don't worry about the acid in your stomach, it's under control.'"
"Stomach acid is strong enough to dissolve metal if given the chance, so your stomach needs that constant makeover to keep itself from dissolving.
Most people have no clue this happens every week."
21. Lastly, "When you don't get enough sleep, your brain can actually start 'eating' itself. Microglial cells, which are responsible for clearing waste in the brain, begin to break down and consume healthy neurons and connections, not just damaged ones."
"This process, known as astrocytic phagocytosis, increases when you are sleep-deprived. Over time, this can lead to memory problems, slower thinking, and an increased risk of diseases like Alzheimer's."
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