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OpenStudy (anonymous):
. The skin acts as a physical barrier and prevents foreign substances entering the body. In which system is the skin playing a role by performing this function? excretory system digestive system immune system nervous system
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OpenStudy (anonymous):
@lulubj
OpenStudy (lulubj):
immune system
OpenStudy (anonymous):
Course, lawl
OpenStudy (lulubj):
lol
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