LittleMaaahi LittleMaaahi

02-03-2017
Biology

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How does the body make it difficult for a pathogen to reach a part of the body that can cause disease

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sdmatera sdmatera

02-03-2017

With multiple lines of defense including hair, defense mechanisms like sneezing, and various antigens

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popcornrox37 popcornrox37

02-03-2017

I took this a while ago, however I believe that it is due to the semi-permeable layer that each cell has that only allows certain substances to pass through to the inner parts of the cell

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