kikionfleek
kikionfleek kikionfleek
  • 25-04-2017
  • Biology
contestada

The heart and lungs are two examples of structures called
A. Connective tissue
B. Organ systems
C. Epithelial tissue
D. Organs

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byakkomaru
byakkomaru byakkomaru
  • 25-04-2017
The heart and lungs are both Organs
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