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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.