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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
Did you know?
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Did you know?
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
Did you know?
The horizontal fraction bar was introduced by the Arabs.