PROFESSOR PETER CULL / SCIENCE PHOTO LIBRARY PROFESSOR PETER CULL / SCIENCE PHOTO LIBRARY
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Animal cell. Illustration of an animal cell revealing various internal structures. The nucleus (dark pink, at centre) contains genetic material and the nucleolus (purple, at centre). This is surrounded by a system of pink membranes known as the endoplasmic reticulum (ER). The nucleolus and ER play roles in protein synthesis. Proteins are stored in the brown golgi apparatus and transported through the cell by the various vesicles. Yellow mitochondria supply the cellular energy and the tube-like microtubules and centrioles assist with cellular movement.
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