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Home Q & A Board Science-Related Homework Help Psychology
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mcranfield mcranfield
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6 years ago
The main function of the immune system is to
 
  A) manufacture white blood cells.
  B) manufacture red blood cells.
  C) protect internal organs.
  D) defend against foreign invaders.
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tdclarktdclark
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6 years ago
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mcranfield Author
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6 years ago
Thanks for your help!!
bkrandy
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Yesterday
This calls for a celebration Person Raising Both Hands in Celebration
veronee_madison
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2 hours ago
Just got PERFECT on my quiz
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