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Ahmedempty Ahmedempty
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6 years ago
The first line of defense against microorganisms and infection entering the body is the person's
 
  A) Gastrointestinal tract
  B) Mucous membranes
  C) Hair
  D) Skin
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JazzyjayJazzyjay
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6 years ago
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Ahmedempty Author
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6 years ago
Thanks for your help!!
julymontalvo
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
Tabitha.davis
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2 hours ago
this is exactly what I needed
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