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Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

A positive feedback loop. A positive feedback loop.
The oxygen sensor provides a quick response at the stoichiometric air–fuel ratio of 14.7:1. The oxygen sensor provides a quick response at the stoichiometric air–fuel ratio of 14.7:1.
The clonal selection theory of the adaptive immune response The clonal selection theory of the adaptive immune response
The response of the lac operon in the absence of lactose The response of the lac operon in the absence of lactose
Feedback control of ADH secretion Feedback control of ADH secretion
Immune-to-brain signaling occurs in response to infection, injury, and inflammation that occur in pe Immune-to-brain signaling occurs in response to infection, injury, and inflammation that occur in pe
Video: Arthroscopy

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