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Which of the following systems help in absorbing oxygen and releasing carbon dioxide? a. respiratory system. c. integumentary system. b. muscular system. d. none of the above.
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Which of the following systems help in absorbing oxygen and releasing carbon dioxide? a. respiratory system. c. integumentary system. b. muscular system. d. none of the above.

User Mike Roll
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A. Respiratory system
User Benbotto
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4 votes
The respiratory system (a)
User Lisaann
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