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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Muscular system Muscular system
Motion of the barycenter of the Solar System relative to the Sun Motion of the barycenter of the Solar System relative to the Sun
lymphatic system lymphatic system
Example of a Regulatory System Example of a Regulatory System
The components of the respiratory system with micrographs of the respiratory epithelium and alveoli. ... The components of the respiratory system with micrographs of the respiratory epithelium and alveoli. ...
Insect tracheal system. Chitin rings reinforce branching, air-filled tubes in such respiratory syste Insect tracheal system. Chitin rings reinforce branching, air-filled tubes in such respiratory syste
Video: Proteins

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