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Which body system completes the organizational series below

muscle cell - cardiac tissue- heart - ______ -human

a. integumentary system
b.respiratory system
c.circulatory system
d. skeletal system

User Begie
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2 Answers

9 votes
answer: respiratory system
User Moj
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8 votes
Circulatory System!

Hope this helps! Sorry if Im wrong!
User Reco Jhonatan
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