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

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Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

External female genitalia External female genitalia
Procedures and Diagnostic Tests Related to the Female Reproductive System Procedures and Diagnostic Tests Related to the Female Reproductive System
The female and male urinary systems. The female and male urinary systems.
A typical accelerator pedal position (APP) sensor, showing two different output voltage signals ... A typical accelerator pedal position (APP) sensor, showing two different output voltage signals ...
Male to Female Sex Ratio at Birth vs. PCB Concentration in Maternal Serum Male to Female Sex Ratio at Birth vs. PCB Concentration in Maternal Serum
Video: Neuron structure and function - sensory neurons, association neurons & motor neurons

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