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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Although large, the cougar is more closely related to smaller felines. Although large, the cougar is more closely related to smaller felines.
Frequency distribution curve: interpatient variability in drug response Frequency distribution curve: interpatient variability in drug response
Procedures and Diagnostic Tests Related to the Integumentary System Procedures and Diagnostic Tests Related to the Integumentary System
Torque is a twisting force equal to the distance from the pivot point times the force applied ... Torque is a twisting force equal to the distance from the pivot point times the force applied ...
Classes and Frequency of Breast Cancer Susceptibility Genes Classes and Frequency of Breast Cancer Susceptibility Genes
Concepts related to the pathogenesis of myocardial infarction in an individual with diabetes. Concepts related to the pathogenesis of myocardial infarction in an individual with diabetes.
Video: Muscular System Animation

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