Fact : What makes body hair stand on end?

When are you frightened you may feel a tingling sensation down the back of your neck. This is your hair standing on end! It is caused by small muscles at the root of each hair. Although it is not very very visible in humans you can see it clearly when a cat is frightened. Its hairs stand erect so the animal appears bigger to its enemies.

fact: why do we have eyebrows ?

Although we have hair all over our bodies,
it tends to grow thickest where some form of
protection is needed. Both eyebrows and eyelash
are designed to protect the eyes from dust.

facts: why do people blink?

Facts: Everytime we blink,
normally about 360 times per hour,
tear is secreted by the lachrymal
gland In the corner of the eye.
This tear spread over the cornea
to keep the eyeball clean & moist.
The amount you blink increases when dust,
wind or brignt light threates to harm the eye.

What is the weight of human heart?

Did you know?
The heart of an average woman about 8 oz (250 grams).
The heart of an adult man is heavier and weighs around 10 oz (300 grams).

What is the purpose of yawn ?

One usually yans when bored or tired.
yawning makes you draw in breath, filling your lungs with air (searching for oxigen).
This increase the oxygen supply to the blood to help wake yourself up.