The circulatory aids with the immune system because they provide white-blood cells to help fight with the diseases or sicknesses.
There are different ways to treat the problem. You can apply heat to infected area, elevate your leg, use an over the counter anti-infammation drug, and possibly wear a compression stocking.
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I think the answer is B i might be mistaken though c:
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The size of a population of microorganisms in liquid culture may bemeasured by counting cells directly or by first diluting the original sample and then counting cell numbers (see below), or by taking some indirect method such as the turbidity (cloudiness) of the culture.
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