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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.

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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

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There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Components of a long bone. The entire long bone is on the left side accompanied by a blowup of the p Components of a long bone. The entire long bone is on the left side accompanied by a blowup of the p
The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ... The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ...
The arrangement of water molecules in (a) solid ice, and (b) liquid water. The arrangement of water molecules in (a) solid ice, and (b) liquid water.
How Solid Fats and Added Sugars Fit into a Healthy Diet How Solid Fats and Added Sugars Fit into a Healthy Diet
Each chromosome consists of a single, long molecule of DNA within which are the sequences of individ Each chromosome consists of a single, long molecule of DNA within which are the sequences of individ
Video: Evolutionary tree of life Animation

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