sta3ngexdee
sta3ngexdee sta3ngexdee
  • 23-09-2016
  • Biology
contestada

a human heart is an example of a (an): a. tissue b. organ c. cell d. compound

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hangingbyathread
hangingbyathread hangingbyathread
  • 23-09-2016
cells make up tissues, tissues make up organs, organs make up organ systems. The heart is an organ 
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