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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.
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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.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
![Polyps and polyposis. A polyp is a protruding growth from a mucous membrane lining a hollow organ. I](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_23_54_9689598.jpeg)
![Diphtheria. The bacteria that cause this disease, called Corynebacterium diphtheriae, proliferate in](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_18_44_100372029.jpeg)