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When does the circulatory system work with the respiratory system? a- during cellular respiration b- during blood cell formation c- during intestinal digestion d- during a viral infection
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When does the circulatory system work with the respiratory system?

a- during cellular respiration
b- during blood cell formation
c- during intestinal digestion
d- during a viral infection

User Hangy
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2 Answers

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B- during blood cell formation
User Danra
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2 votes
It is during breathing so cellular respiration
User Alos
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