What are muscles made of?
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a. fibers
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b. white blood cells
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c. ligaments
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d. blood vessels
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Nina has the flu and a high fever. her immune system is exhibiting the line of defense. this defense is part of immunity.

Akey feature of all epidemiology is the definition of a at risk. select one: a. pathogen b. ethnicity c. population d. lifestyle e. insect

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health