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Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
Did you know?
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Did you know?
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
The longest a person has survived after a heart transplant is 24 years.