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- -- card: 92823 from stack: in
- -- bmap block id: 111889
- -- flags: 0000
- -- background id: 21281
- -- name:
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- -- part contents for background part 18
- ----- text -----
- A very small, complex unit of protoplasm containing a nucleus, cytoplasm, and an enclosing membrane. All animals and plants are composed of cells.