The average adult has about 21 square feet of skin.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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 cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
Human Hair
Range of Motion of the Shoulder Joint, External Rotation
Structures of human DNA polymerase g (left) and T7 phage DNA polymerase (right) holoenzymes
A human pedigree of the X-linked color-blindness trait