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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Changes in metabolic rate of selected structures in a mammal's body during different activities Changes in metabolic rate of selected structures in a mammal's body during different activities
Examples of three types of joints found in the body. Examples of three types of joints found in the body.
Coordination of antagonist muscles to perform movement. Coordination of antagonist muscles to perform movement.
Thorax Posterior view of human body Thorax Posterior view of human body
Use thumbs to apply stripping effleurage to the muscle just lateral to the shin bone (tibialis ... Use thumbs to apply stripping effleurage to the muscle just lateral to the shin bone (tibialis ...
Structure of a skeletal muscle. Structure of a skeletal muscle.
Video: Monohybrid crosses

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