Everyone has one nostril that is larger than the other.
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?
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 adult has about 21 square feet of skin.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Skeletal muscle structure.
An illustration of the structure of the Sun:
Generalized structure of a plasma lipoprotein
Structure of HIV reverse transcriptase
Structure of human OGG1 with either guanine or 8-oxoguanine bound flipped out and bound