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Author Question: An ultrasound study would NOT be useful to observe the actions of heart valves. (Read 61 times) |
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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 word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The human body produces and destroys 15 million blood cells every second.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.