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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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Thyroid conditions may make getting pregnant impossible.

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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Color enhanced X-ray showing a pacemaker implanted in the left side of the chest and the electrode w Color enhanced X-ray showing a pacemaker implanted in the left side of the chest and the electrode w
Human Heart Cir Human Heart Cir
Maximal Heart Rate Over Time Maximal Heart Rate Over Time
Desmosomes and gap junctions, as shown in heart muscle. Desmosomes and gap junctions, as shown in heart muscle.
Heart valves in closed position viewed from the top. Heart valves in closed position viewed from the top.
Target Heart Rate Target Heart Rate
Video: Four Giant Convection Cells oF Earth

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