The Top 13 Amazing Facts About the Human Body

Multiple sclerosis happens far more commonly in temperate areas than in semitropical or tropical areas, but nobody knows why.

On average, a person loses approximately 600,000 skin particles per hour, amounting to about a pound and a half per year.

Medical scientists don't know the reason, but after studying nearly 80,000 people, including those convicted of violent crimes, it was found that people with low cholesterol levels are far more likely to be violent or to commit suicide than people who were non-violent and who didn't have suicidal tendencies.

A normal, healthy baby is born with 350 bones in their bodies. A normal, healthy adult has 206 bones. A human doesn't lose bones through growth, but many bones end up fusing together. Medical science doesn't know what triggers some bones to fuse together, but not others.

Although people aren't aware of it, when they look at something, the image that is transmitted to the brain is upside down. The visual cortex of the brain automatically flips the image over, so we don't realize that we actually see inverted images. Science is still unclear how the brain is able to do this.

Ewww!!  There is an average number of over 30 million bacteria on every square inch of a person's body. Apparently, bathing or showering does little to change this.

Dopamine is a neurotransmitter in the brain. Doctors often prescribe it to treat low blood pressure, heart failure, sleep problems, restless leg syndrome, and several other ailments. It is also important in the proper function of the memory, mood, learning, attention, and movement. This is one of the 'feel good' substances in the brain and it is produced when there is pleasurable stimulation, such as during eating and while having an orgasm. Yet, for some unknown reason, people who take dopamine or dopaminergic drugs are many times more likely to become addicted to gambling than those who don't.

Every day, the average human heart pumps about 2,000 gallons of blood through the body's roughly 60,000 miles of blood vessels. Additionally, doctors can replace joints, the heart, arms, and legs with synthetics, but blood can't be synthesized. 

After a lengthy 10-year study, it has been found that people are 20% more likely to suffer a heart attack on Monday and to die of that heart attack, than on any other day of the week. Medical science doesn't know for sure why this is, though there are plenty of guesses.

A healthy adult can survive for about 21 days without food. However, if they are deprived of sleep, they will die in less than a week. If you think that getting a good night's sleep isn't important, think again.