Cell structure: animals

An overview of the structure of an animal cell.

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  • Contained inside the nuclear envelope which contains nuclear pores to allow movement of substances.
  • Contains a nucleolus which is a dense structure of nucleic acid and crystalline protein. Contains cell's DNA.
  • Involved in ribosome system.
  • Largest organelle in the cell.
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  • Bound by a double membrane.
  • Convert chemical energy into ATP through respiration
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Rough Endoplasmic Reticulum

  • Ribosomes attached to surface.
  • Transport proteins are synthesised here.
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Smooth Endoplasmic Reticulum.

  • Network of tubes and flattened sacs.
  • Continuous with plasma and nuclear membrane.
  • Site for lipid and carbohydrate metabolism (including hormone synthesis)
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  • Manufacture proteins
  • Either free in cytoplasm or on the surface of the Rough Endoplasmic Reticulum.
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Golgi Apparatus

  • Series of sacs stacked on top of one another.
  • Stores, modifies and packages proteins.
  • Tags proteins so that they end up at the correct destination.
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  • Associated with nuclear division
  • Microtubular structures
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  • Bound by a single membrane.
  • Contain and transport enzymes that break down food and foreign matter.
  • Have little internal structure.
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