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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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and
Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
Thyroid scan. The right image is the data from a thyroid scan, printed on a superimposed map of the
Major moons of Uranus in order of increasing distance (left to right), at their proper relative size
Functional MRI Scans These scans of human brains show localized average increases in neural activity
Thumb web–forearm stimulation. Using the thumb and finger of your left hand, squeeze the webbing ...