30 Cool But Pretty Disturbing Facts About The Human Body That Not Many People Know About

The intestines are covered by a double "fleece" of peritoneum. See it like a blanket.

When your intestines get damaged for whatever reason, this blanket starts moving out of itself and crawling upwards towards the place which has the injury. It will stay there until the injury is recovered. And then move on again.

Maybe not the most creepy fact, but definitely interesting in my opinion.

Human beings are a cesspool of bacteria and when you die your body eats itself from the inside out.

There is an urban myth that your fingernails continue to grow after death, which is supposed to explain why dead bodies often appear to have long nails.

The truth is that the soft tissues in the fingers and hands tend to contract as they lose moisture, leading to the *appearance* of growing nails.

One thing that spun me out was hearing about Fallopian tubes after a friend went through emergency surgery.

Fallopian tubes are mobile and active parts of your reproductive tract. When one tube isn't there or is “broken” the other tube can actually move over to the opposite ovary and “pick up” an available egg.

Our minds can be tricked, and our minds can trick us. Some people sleep with their eyes open. Our memories are fallible. If you remember something from 10+ years ago, the events in your mind are likely changed. You might remember a couple things properly, but our memories are almost never 100% accurate. On top of that, we usually don't remember the unimportant stuff. Our dreams are a product of our subconscious, from any memory especially recent ones.

Edit: thank you for the upvotes! :D.

You can grow tumours with hair, teeth, and eyes but no heart or brain.

My favorite is the blind spot at the center of each eye, where the optic nerve is.

A lot of people don't even know it exists, and even if they do, it is bigger than people often think.

And it's also really easy to demonstrate to people if you know how. It's one of my favorite bar tricks - all you need is a pen and a napkin to draw a cross and a dot.

https://thebrain.mcgill.ca/flash/capsules/experience_jaune06.html

Alternate demo: https://faculty.washington.edu/chudler/chvision.html

Edit: If it doesn't work, you're doing something wrong - not getting close enough, the image is too small on your phone, you're not closing the correct eye or not keeping your gaze fixed on the cross.

It isn't because you don't have a blind spot. Unless you're a squid, you have a blind spot. All vertebrates have them.

The fact that our chromosomes can never truly and perfectly replicate themselves. Most defections can be and is usually fixed and wont cause any harms. But if the damage is too big to be fixed that cell will literally commit suicide, If it doesnt the cells around it will try to kill it. If they cant the immune system and white blood cells deal with it. But if a defected cell survives all 3 of these counter measures. It will start to rapidly replicate and replicate. This is how a tumor forms and how we get cancer. Cancer wont stop growing untill its host is dead. This is also why its this hard to treat since cancer cells arent a new organism they are still fundementally human cells. any medication that aims to kill them risks the chance of killing the healthy cells with the cancer cells. This is why we cant be too agressive with medication on cancer. Any part that can be physically removed will be removed via surgery and the rest will be taken care of with chemotherapy and meds. If the tumor is big enough to be physically removed but is in a position that makes it almost impossible to remove it like around vital organs or veins that person will most likely die. So yeah there is only 3 measures between you and having cancer.

Edit: I am so happy that my comment has lead to an educative conversation in the replies. You guys rule. And also I have to say this too. Cancer cant be prevented due to its nature unfortunately.

You can become allergic to yourself.

Humans are bioluminescent. We literally glow, the visible light that emits from our bodies are 1000 times less intense than the levels which pur eyes are sensitive to.