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Portal:Medicine

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The medicine portal

Physician examining a patient.
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Medicine is the branch of health science and the sector of public life concerned with maintaining or restoring human health through the study, diagnosis and treatment of disease and injury. It is both an area of knowledge—a science of body systems, their diseases and treatment—and the applied practice—an art or craft—of that knowledge. However, medicine often refers more specifically to matters dealt with by physicians and surgeons.

The term "medicine" is sometimes used amongst medical professionals as shorthand for internal medicine. Veterinary medicine is the practice of health care in animal species other than human beings. Please see our medical disclaimer for cautions about Wikipedia's limitations.

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Morphine (INN) (IPA: [ˈmɔ(ɹ)fin]) is a highly potent opiate analgesic drug and is the principal active agent in opium and the prototypical opioid. Like other opiates, e.g. diacetylmorphine (heroin), morphine acts directly on the central nervous system (CNS) to relieve pain, and at synapses of the nucleus accumbens in particular. Studies done on the efficacy of various opioids have indicated that, in the management of severe pain, no other narcotic analgesic is more effective or superior to morphine. Morphine is highly addictive when compared to other substances, and tolerance, physical and psychological dependences develop very rapidly.

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Apikal4D.gif
Animation of a three-dimensional echocardiogram. The heart is viewed from the apex (tip), with the apical part of the ventricles removed. The mitral valve can clearly be seen to open and close. The leaflets of the tricuspid and aortic valve are not clearly visible, but the openings are. To the left are two standard two-dimensional views.

Photo credit: Kjetil Lenes (GFDL/cc-by-sa-3.0)

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