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The arrows between the circulatory system and respiratory system show ______. The arrow going from the respiratory system to the circulatory system shows ____. The arrow going from the circulatory system
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The arrows between the circulatory system and respiratory system show ______.

The arrow going from the respiratory system to the circulatory system shows ____.

The arrow going from the circulatory system back to the respiratory system shows ____.

User Demiurg
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Answer:

I think it’s the flow of blood I may be wrong though

Step-by-step explanation:

User Kylaaa
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