There are 20 feet of blood vessels in each square inch of human skin.
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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Pattern development in a human embryo
Pattern for Tactile Fremitus, Right Lateral Thorax
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.