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

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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Excessive alcohol use costs the country approximately $235 billion every year.

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

X-ray showing typical joint changes associated with osteoarthritis. X-ray showing typical joint changes associated with osteoarthritis.
Renal blood vessels and the pathway of blood through the renal system. Renal blood vessels and the pathway of blood through the renal system.
Electronic service information is available from aftermarket sources, such as All-Data and ... Electronic service information is available from aftermarket sources, such as All-Data and ...
A typical IAC. A typical IAC.
The WISER entry for hydrogen cyanide (bottom). Useful information includes detailed health ... The WISER entry for hydrogen cyanide (bottom). Useful information includes detailed health ...
The Male Reproductive System The Male Reproductive System
Video: Type of Cell Junctions - Desmosome, Hemidesmosomes and Gap Junctions

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