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?
The human heart beats about 100,000 times per day.
This amounts to about 35 million beats per year and 2.5 billion beats in an average lifetime. The...
Did You Know?
Your stomach acid could dissolve a razor blade.
Stomach acid, with a pH between 1 and 3, is strong enough to dissolve metal. A study found...
Did You Know?
Your body produces enough saliva in your lifetime to fill two swimming pools.
The average person produces about 1-1.5 liters of saliva daily, totaling about 25,000 gallons over a lifetime. Saliva...