Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
A young gerbil sitting by the food bowl to eat
Airplane Food
Basic principle of target-probe hybridization in microarray chips.