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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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.
Amazing NASA Pictures Collection
Position effect variegation of eye color in Drosophila