Vaccines prevent between 2.5 and 4 million deaths every year.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The average adult has about 21 square feet of skin.
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Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Hip Typically occurs as a result of a fall; with osteoporosis, hip fractures can occur as a result o
Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa
Stages in Wound Healing
Masters and Johnson’s Four-Phase Model of the Sexual Response Cycle
Sleep disorder causes
The Stages of Labor and Birth in a Vaginal Delivery