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Which are the 4 sub-components of the Cardio-respiratory system? Question 7 options: A. Heart, spleen, lungs and liver B. Heart, blood, spine and liver C. Heart, blood, blood vessels, and lungs D. Heart, stomach, lungs and liver

User Jared Ng
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2 Answers

3 votes
I would go with option A 
User ThePavolC
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4 votes
I'm pretty sure its D

User Deepstop
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