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'''Foreign material''' is something that is extrinsic to the body. | '''Foreign material''' is something that is extrinsic to the body. | ||
==General== | |||
*Relatively common. | |||
*Seen in a number of contexts. | |||
==Gross== | |||
*Looks like it doesn't belong, e.g. food. | |||
==Microscopic== | ==Microscopic== |
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