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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

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Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants. Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants.
The process of phagocytosis: a phagocyte engulfing bacteria or other foreign material. The process of phagocytosis: a phagocyte engulfing bacteria or other foreign material.
Bacteria may be named for their morphology (shape): cocci (spherical), bacilli (rod shaped), or ... Bacteria may be named for their morphology (shape): cocci (spherical), bacilli (rod shaped), or ...
The peptidoglycan layer of Gram-positive bacteria The peptidoglycan layer of Gram-positive bacteria
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Video: System organization - PPM system types (Somatic, Autonomic & Enteric) and Reflex arc types

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