daweilin daweilin
  • 18-12-2020
  • Biology
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Which of the following is made of tissues and is part of an organ system? A. a heart B. a muscle cell C. a carbon atom D. a water molecule

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gp738902 gp738902
  • 18-12-2020

Answer:

heart

Explanation:

heart is an organ and part of the cardiovascular system

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