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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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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Human infants are like all other placental mammals, except they are born at a less developed state. Human infants are like all other placental mammals, except they are born at a less developed state.
The Sleep/Waking Flip-Flop According to Saper et al. (2001), the major sleep-promoting region (the v The Sleep/Waking Flip-Flop According to Saper et al. (2001), the major sleep-promoting region (the v
Christo, Over the River, Project for the Arkansas River, State of Colorado. Christo, Over the River, Project for the Arkansas River, State of Colorado.
Plasma protein binding and drug availability. (a) Drug exists in a free state or bound to plasma ... Plasma protein binding and drug availability. (a) Drug exists in a free state or bound to plasma ...
Guardian Figures at Gate A of the Citadel Of Sargon II During Its Excavation in the 1840s Guardian Figures at Gate A of the Citadel Of Sargon II During Its Excavation in the 1840s
Conversion of F+ to an Hfr state occurs by integration of the F factor Conversion of F+ to an Hfr state occurs by integration of the F factor
Video: Type of Cell Junctions - Desmosome, Hemidesmosomes and Gap Junctions

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