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Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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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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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

A biofilm composed of a community of microorganisms glued by mucilage to a surface. A biofilm composed of a community of microorganisms glued by mucilage to a surface.
Vessels composed of vessel elements in xylem tissue. Vessels composed of vessel elements in xylem tissue.
he vertebrate stomach as an example of an organ composed of all four tissue types he vertebrate stomach as an example of an organ composed of all four tissue types
Electronmicrograph showing a blood clot composed of fibrin, red blood cells, and tissue debris. Electronmicrograph showing a blood clot composed of fibrin, red blood cells, and tissue debris.
The ribosomes themselves are composed of RNA strands. The ribosomes themselves are composed of RNA strands.
Table Salt Is Composed of Sodium and Chloride Table Salt Is Composed of Sodium and Chloride
Video: Introduction to Human Immunodeficiency Virus (HIV)

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