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OpenStudy (elizabeths):
. Identify three types of barriers in the body’s first line of defense. Give an example of each type of barrier.
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OpenStudy (koikkara):
@ElizabethS Hmm... Since direct answers are not allowed, have a visit to : http://www.hammiverse.com/lectures/43/1.html Might help you do all exercises regarding this topic. Wondering If you are satisfied with this answer, Please close this Question. Thank You ! Keep in touch with Open Study.. Bye !
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