40 Facts About The Human Body That Most People Don’t Know

There are some interesting facts about the human body that most people don’t know. A Reddit user asked ‘What is a fact about the human body that not many people know about?’ and here are 40 of the responses.


human bodyAndibular

Your brain regulates how strong your muscles are. If your leg muscles were to contract at full strength, they would snap your femur.

Its why people in emergencies on adrenaline can lift cars off children. Your body is capable of great strength, but it could also severely damage you, so your brain keeps you a weak, soft bag of jelly.


When doing surgery where the doctors have to take out some organs, when placing them back, they don’t have to be put back In the exact position there meant to be, your body kind of just, moves the organs into the correct position after the surgery


human bodylocalhelic0pter7

People who live in “extreme” conditions for generations adapt in extreme ways. For example people that live in high elevations often have larger lungs and different blood makeup. Or my favorite is the Bajau people that live on the water and spend a lot of their time diving, their spleens have become 50% larger in order to store more blood.



The heart smells like mushrooms.

Source: I’m a cardiac anesthesiologist


human bodyBlocterDocterFocter

You hate the sound of your recorded voice because it’s missing the low frequency you’re used to hearing.

When you talk, you hear your voice as it goes to the air and back to you ear. It also goes through your skull to your ear, and this bone conduction mechanism transmits the low frequencies better than air does.

Your recorded voice only has the air transmitted sound. That causes the dissonance between what you think your voice sounds like, and what it really does. It’s also why your voice will (almost) always be higher pitch than you think.



Humans have, on average, just as many hairs on their body as chimpanzees, human hair is just a lot shorter and finer.


human bodySlavicSquat1234

Your eyes have a separate immune system from the rest of your body and in a lot of occasions if your body’s immune system finds your eyes, they will assume they are a foreign body and blind you.



Humans are bioluminescent and glow in the dark, but the light that we emit is 1,000 times weaker than our human eyes are able to pick up.


human bodyBitchmom_6969

When you cry and your nose becomes runny, it’s actually your tears.



Our brains make up, on average, around 2% of our body weight but consume 20% of our caloric intake