The surface area of a human lung is equal to a tennis court.
Women's hearts beat faster than men's.
Scientists have counted over 500 different liver functions.
The aorta is nearly the diameter of a garden hose.
Your left lung is smaller than your right lung to make room for your heart.
You could remove a large part of your internal organs and survive.
The adrenal glands change size throughout life.
Sneezes regularly exceed 100 mph.
Coughs clock in at about 60 mph.
Women blink twice as many times as men do.
A full bladder is roughly the size of a soft ball.
Approximately 75% of human waste is made of water.
Feet have 500,000 sweat glands and can produce more than a pint of sweat a day.
During your lifetime, you will produce enough saliva to fill two swimming pools.
The average person expels flatulence 14 times each day.
Earwax production is necessary for good ear health.
The largest cell in the human body is the female egg and the smallest is the male sperm.
The three things pregnant women dream most of during their first trimester are frogs, worms and potted plants.
Your teeth start growing 6 months before you are born.
Babies are always born with blue eyes.
Babies are, pound for pound, stronger than an ox.
One out of every 2,000 newborn infants has a tooth when they are born.
A fetus acquires fingerprints at the age of three months.
Every human spent about half an hour as a single cell.
Most men have erections every hour to hour and a half during sleep.
After eating too much, your hearing is less sharp.
About one third of the human race has 20-20 vision.
If saliva cannot dissolve something, you cannot taste it.
Women are born better smellers than men and remain better smellers over life.
Your nose can remember 50,000 different scents.
Even small noises cause the pupils of the eyes to dilate.
Everyone has a unique smell, except for identical twins.
The ashes of a cremated person average about 9 pounds.
Nails and hair do not continue to grow after we die.
By the age of 60, most people will have lost about half their taste buds.
Your eyes are always the same size from birth but your nose and ears never stop growing.
By 60 years of age, 60-percent of men and 40-percent of women will snore.
A baby's head is one-quarter of it's total length, but by age 25 will only be one-eighth of its total length.
Monday is the day of the week when the risk of heart attack is greatest.
Humans can make do longer without food than sleep.
A simple, moderately severe sunburn damages the blood vessels extensively.
Over 90% of diseases are caused or complicated by stress.
A human head remains conscious for about 15 to 20 seconds after it is been decapitated.
It takes 17 muscles to smile and 43 to frown.
Babies are born with 300 bones, but by adulthood the number is reduced to 206.
We are about 1 cm taller in the morning than in the evening.
The strongest muscle in the human body is the tongue.
The hardest bone in the human body is the jawbone.
You use 200 muscles to take one step.
The tooth is the only part of the human body that can't repair itself.
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Pajama Day in Bed
Turn your day inside into the ultimate time to do nothing but relax. Get on your most comfortable pajamas, gather some cozy blankets, and round up reading materials or watch TV, all while you do some serious lounging in bed.