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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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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa
Human immunodeficiency virus. Human immunodeficiency virus.
Ebola Virus Geographic Distribution Ebola Virus Geographic Distribution
Inside of the Human Immunodeficiency Virus (HIV) Inside of the Human Immunodeficiency Virus (HIV)
The structure of the influenza virus The structure of the influenza virus
Human Viruses Associated with Cancers Virus Human Viruses Associated with Cancers Virus
Video: Deglutition

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