page_title: Centriole
section_title: Cellular organization
hierarchical_section_title: Centriole / Cellular organization
caption_attribution_description: English: Centrioles. See a full animation of this medical topic.
context_page_description: In cell biology a centriole is a cylindrical organelle composed mainly of a protein called tubulin. Centrioles are found in most eukaryotic cells. A bound pair of centrioles, surrounded by a highly ordered mass of dense material, called the pericentriolar material, makes up a structure called a centrosome.
  Centrioles are not present in all eukaryotes; for example, they are absent from conifers, flowering plants and most fungi, and are only present in the male gametes of charophytes, bryophytes, seedless vascular plants, cycads, and ginkgo.
  Centrioles are typically made up of nine sets of short microtubule triplets, arranged in a cylinder. Deviations from this structure include crabs and Drosophila melanogaster embryos, with nine doublets, and Caenorhabditis elegans sperm cells and early embryos, with nine singlets.
  The main function of centrioles is to produce cilia during interphase and the aster and the spindle during cell division.
context_section_description: Centrioles are a very important part of centrosomes, which are involved in organizing microtubules in the cytoplasm. The position of the centriole determines the position of the nucleus and plays a crucial role in the spatial arrangement of the cell.
caption: 3D rendering of centrioles
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