"When doing surgery, organs don't have to be put back in the exact position they are meant to be. Your body kind of just moves the organs into the correct position after the surgery."
"Your brain regulates how strong your muscles are. If your leg muscles were to contract at full strength, they would snap your femur. It's 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."
"The average human erection has roughly about 130ml of blood in it, while the average rabbit has about 126ml in its entire body. So, there is more blood in a boner than in a bunny."
"Alzheimer’s disease isn’t just gradual loss of memory. It physically exists in the brain. It’s a physical substance that attacks the brain. Like, if you were able to open the skull of a person suffering from Alzheimer’s disease to take a look at their brain, you would actually see this sticky, fibrous, grey physical matter overtaking their brain."
"Our brain looks wrinkled because it is actually "folded" inside our skull in order to fit a maximum of surface and thus neurons and cell communications. Some animals like rodents have a completely smooth brain."
"Your stomach is surrounded by more brain cells (half a billion neurons) than the brain of a cat contains in total. It's your enteric nervous system. It controls digestion, operates autonomously, has its own memory, can handle its own reflexes, it even has its own senses. It's thought to have come about because of the blood-brain barrier and the main brain being locked away in the skull, a spinal column and nerves away from the critical action of nutrition."
"Your cornea (in the eye) is the only part of your body that doesn't get oxygen from your lungs. The cornea just absorbs free oxygen from the air like insects do. This is why contact lenses have to be breathable!"
"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."
"Your heart rate increases about a minute before partaking in exercise. It is known as the anticipatory rise and happens involuntarily."
"Right before you vomit, your mouth fills with quite a bit of saliva, this normally happens like 30–45 seconds before you vomit. It does this to help protect your mouth from the acids in the vomit. It's also a good indicator that you are going to vomit. So if that happens to you, find the nearest toilet, bush, or garbage can."