Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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There are 60,000 miles of blood vessels in every adult human.
The respiratory system: nasal cavity, pharynx, larynx, trachea, bronchus, and lung with expanded vie
Basic DNA structure
Oceanic Crust Has a Well-defined Internal Structure
A schematic model of the effects of cholesterol on synthetic membrane structure
Structure of Salmonella typhimurium glutamine synthetase