The familiar sounds of your heart are made by the heart's valves as they open and close.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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The human body produces and destroys 15 million blood cells every second.
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Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic
