The largest cell in the human body is the female egg and the smallest is the male sperm. The egg is the only cell that is visible by the naked eye.
Feet have 500,000 sweat glands and can produce more than a pint of sweat a day.
Acid in your stomach is strong enough to dissolve razor blades. The reason it doesn't eat away at your stomach is that the cells of your stomach wall renew themselves that you get a new stomach lining every three to four days.
Sneezes regularly exceed 100 mph; coughs clock in at about 60 mph.
Your body has enough iron in it to make a nail 3 inches long.
Your nose can remember 50,000 different scents. Women are better smellers than men all their lives.
The human body is estimated to have 60,000 miles of blood vessels.
The tooth is the only part of your body that cannot repair itself.
By 60 years of age, 60% of men and 40% of women will snore.
The human brain cell can hold 5 times as much information as an encyclopedia. Your brain cannot feel pain, is made up of 80% water.
People who dream more often and more vividly, on average have a higher IQ.
The fastest growing nail is on the middle finger.
Facial hair grows faster than any hair upon the body.
You have as many hairs per square inch on your body as a chimpanzee.
Human feet have 52 bones, accounting for a quarter of the body's bones.
A human fetus acquires fingerprints at the age of three months.
By the age of 60, most people will have lost about half of their taste buds.
About 32 million bacteria call every inch of your skin home. Most are harmless.
The strongest muscle in the human body is the tongue and the hardest bone is the jawbone.
The colder the room you sleep in, the higher the chances you'll have a bad dream.
Human lips have a reddish color because of the tiny capillaries just below the skin.
Three hundred million cells die in the human body every minute.
It takes 17 muscles to smile and 43 to frown.
Right-handed people live (on average) nine years longer than left-handed people.
Your ears secrete more ear wax when you are afraid than when you aren't.
Koalas and primates are the only animals with unique fingerprints.
Humans are the only animals to produce emotional tears.
The human heart creates enough pressure to squirt blood 30 feet in the air.
Less than one-third of the human race has 20-20 vision. This means that two out of three people cannot see perfectly.