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Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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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.

An adult tooth, longitudinal view showing internal structures of the crown and root. An adult tooth, longitudinal view showing internal structures of the crown and root.
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Video: The Nerve Impulse

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