About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are 20 feet of blood vessels in each square inch of human skin.
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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.
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Vaccines prevent between 2.5 and 4 million deaths every year.
Arterial System Anatomy
Anatomy of the urinary system.
Using a water-based cleaning system helps reduce the hazards from using strong chemicals.
The respiratory system.
Metric System: Measure of Weight and Volume
The traditional human karyotypes derived from a normal female and a normal male