Did You Know?
The cornea is the only part of the body with no blood supply.
The cornea must remain transparent to allow light to enter the eye, so it has evolved to obtain oxygen directly from the air rather than from blood vessels. It's the fastest-healing tissue in the human body and can recover from minor injuries within 24-48 hours.
Did You Know?
Your fingerprints are unique even among identical twins.
While identical twins share DNA, their fingerprints are different due to environmental factors in the womb affecting ridge...
Did You Know?
Human bones are ounce for ounce stronger than steel.
A bone the size of a matchbox can support 18,000 pounds of pressure, roughly four times what concrete...
Did You Know?
The surface area of the human lung is equal to a tennis court.
If all the tiny air sacs (alveoli) in your lungs were flattened out, they would cover an area...