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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.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

The degree of glacier retreat at Glacier Bay, Alaska, since 1794. The degree of glacier retreat at Glacier Bay, Alaska, since 1794.
The American Lion was one of the abundant Pleistocene megafauna, a wide variety of very large mammal The American Lion was one of the abundant Pleistocene megafauna, a wide variety of very large mammal
Large-Flowered Leafcup Large-Flowered Leafcup
Plasma protein binding and drug availability: (a) drug exists in a free state or bound to plasma pro Plasma protein binding and drug availability: (a) drug exists in a free state or bound to plasma pro
Rhythmic compression to gluteal muscles using the fist. Press into the large gluteal muscles moving ... Rhythmic compression to gluteal muscles using the fist. Press into the large gluteal muscles moving ...
The Globe Fishery packs shrimp that weigh more than 1.91 ounces each in packages marked large ... The Globe Fishery packs shrimp that weigh more than 1.91 ounces each in packages marked large ...
Video: Cavernous Sinus Larynx Middle Ear Orbit: Granulesm Animation

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