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Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

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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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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Endothelial cells under the microscope. Endothelial cells under the microscope.
ON and OFF Ganglion Cells ON and OFF Ganglion Cells
Intracellular relationships involving the glyoxylate cycle in plant cells Intracellular relationships involving the glyoxylate cycle in plant cells
Microscopic view of glucagon and insulin secreting cells in the islet Langerhan Microscopic view of glucagon and insulin secreting cells in the islet Langerhan
Pluripotent Stem Cells Pluripotent Stem Cells
Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate
Video: Autonomic Nervous System Animation

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