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Which organ of complex animals is the first line of defense from infection caused by microscopic and macroscopic things? A. skin B. brain C. heart D. stomach
Skin is the first line of defense from infection caused by microscopic and macroscopic things.
Expert answered|pathwise|Points 341|
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Asked 2/4/2012 11:21:52 AM
Updated 348 days ago|12/26/2022 7:27:02 AM
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Edited by Masamune [12/26/2022 7:27:01 AM]
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