Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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There are 60,000 miles of blood vessels in every adult human.
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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
The human embryo
Human Ecology and Biology
Cloud Types: Low Clouds
Types and Locations of Connective Tissue.
Types of Levers
Events in human fertilization. The light micrograph shows a fertilized human oocyte.