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In 1864, the first barbiturate (barbituric acid) was synthesized.

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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Structures of the respiratory system. Structures of the respiratory system.
The digestive system. The digestive system.
The human olfactory system. The human olfactory system.
Landsteiner's experiment demonstrating the exquisite specificity of the immune system. Landsteiner's experiment demonstrating the exquisite specificity of the immune system.
How to solve a linear system by the substitution method How to solve a linear system by the substitution method
The Dual Court System The Dual Court System
Video: Multiple Sclerosis Animation

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