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Author Question: The _____ muscles attach to hair. When these muscles contract, the hair stands erect. Fill in the ... (Read 50 times) |
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.