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 training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
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There are 60,000 miles of blood vessels in every adult human.
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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Negative feedback control of the female reproductive hormones
Polypharmacy in older adults
Maintaining Physiological Balance
Oprah Winfrey reached her goal weight
Birth Control Methods and Abortion
Two ways of treating blocked coronary arteries, the main cause of heart attacks in older adults.