BRAIN FACTS
Women are twice as likely to be diagnosed with depression than men.
The human brain has about 100,000,000,000 (100 billion) neurons.
From all the oxygen that a human breathes, twenty percent goes to the brain.
People who ride on roller coasters have a higher chance of having a blood clot in the brain.
Once a human reaches the age of 35, he/she will start losing approximately 7,000 brain cells a day. The cells will never be replaced.
It is not possible to tickle yourself. The cerebellum, a part of the brain, warns the rest of the brain that you are about to tickle yourself. Since your brain knows this, it ignores the resulting sensation.
Your brain is 80% water.
Your brain is move active and thinks more at night than during the day.
EYE FACTS
Blinking helps to wash tears over our eyeballs. That keeps them clean and moist. Also, if something is about to hit our eye, we will blink automatically.
Our body has some natural protection for our eyes. Our eyelashes help to keep dirt out of our eyes. Our eyebrows are made to keep sweat from running into our eyes.
Our eyes are very important to us, and we must protect them. We don't want dirt, sand, splinters or even fingers to get in our eyes. We don't want our eyes to get scratched or poked. That could damage our sight!
The shark cornea has been used in eye surgery, since its cornea is similar to a human cornea.
The eye of a human can distinguish 500 shades of the gray.
The cornea is the only living tissue in the human body that does not contain any blood vessels.
The conjunctiva is a membrane that covers the human eye.
Research has indicated that a tie that is on too tight can increase the risk of glaucoma in men.
People generally read 25% slower from a computer screen compared to paper.
Men are able to read fine print better than women can.
All babies are colour blind when they are born.
Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose.
The most common injury caused by cosmetics is to the eye by a mascara wand.
It is impossible to sneeze with your eyes open.
The space between your eyebrows is called the Glabella.
Inside our eye, at the back, is a part called the "retina." On the retina are cells called "rods" and "cones." These rods and cones help us to see colors and light.
Just behind the pupil is a lens. It is round and flat. It is thicker toward the middle.
HEART FACTS
Women hearts beat faster than men.
Three years after a person quits smoking, there chance of having a heart attack is the same as someone who has never smoked before.
The human heart weighs less than a pound.
The human heart can create enough pressure that it could squirt blood at a distance of thirty feet.
The first open heart surgery was performed by Dr. Daniel Hall Williams in 1893.
Scientists have discovered that the longer the ring finger is in boys the less chance they have of having a heart attack.
The right lung of a human is larger than the left one. This is because of the space and placement of the heart.
The human heart beat roughly 35 million times a year.
Olive oil can help in lowering cholesterol levels and decreasing the risk of heart complications.
In a lifetime, the heart pumps about one million barrels of blood.
In 1967, the first successful heart transplant was performed in Cape Town, South Africa.
People that suffer from gum disease are twice as likely to have a stroke or heart attack.
Most heart attacks occur between the hours of 8 and 9 AM.
In one day your heart beats 100,000 times.
BLOOD FACTS
Two million red blood cells die every second.
There are approximately 100,000 miles of blood vessels in the human body.
Seven percent of a humans body weight is made up of blood.
Each day 400 gallons of recycled blood are pumped through the kidneys.
By donating just one pint of blood, four lives can be saved.
Blood is such a good stain that Native Americans used it for paint.
The average life span of a single red blood cell is 120 days.
A woman has approximately 4.5 liters of blood in her body, while men have 5.6 liters.
Your blood takes a very long trip through your body. If you could stretch out all of a human's blood vessels, they would be about 60,000 miles long. That's enough to go around the world twice.
Half your body’s red blood cells are replaced every seven days.
