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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Mechanisms of water movement from soil through plants to the atmosphere. Mechanisms of water movement from soil through plants to the atmosphere.
Primary glands of the endocrine system. Primary glands of the endocrine system.
Immunofixation electrophoresis. (a) IgG kappa myeloma, (b) Controls showing total serum protein ... Immunofixation electrophoresis. (a) IgG kappa myeloma, (b) Controls showing total serum protein ...
Rapid Eye Movement Rapid Eye Movement
Circulatory System of a Shark Circulatory System of a Shark
Renin-angiotensin-aldosterone system. Renin-angiotensin-aldosterone system.
Video: Nucleic acid digestion -small intestine

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