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centriole
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Cutaway illustration of a eukaryotic animal cell showing labeled internal structures, including the nucleus, nucleolus, mitochondria, endoplasmic reticulum, Golgi apparatus, and other organelles. Illustration comparing three cell types: a round animal cell and an irregularly shaped plant cell, both showing labeled organelles, and an elongated bacteria cell with labeled structures such as flagella and capsule. Side-by-side labeled diagrams of a typical animal cell and a plant cell, showing internal structures such as nucleus, mitochondrion, endoplasmic reticulum, and unique features like chloroplasts and cell wall in the plant cell.
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centriole

biology
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Cutaway illustration of a eukaryotic animal cell showing labeled internal structures, including the nucleus, nucleolus, mitochondria, endoplasmic reticulum, Golgi apparatus, and other organelles.
Eukaryotic cell Cutaway drawing of a eukaryotic cell.

A centriole is a cellular organelle found near the nucleus, particularly in animal cells. These paired structures are crucial for cell division, specifically in forming the spindle fibers that help separate chromosomes. Each centriole is a cylinder made of nine microtubules arranged in a circle. In animal cells, centrosomes, which organize microtubule arrays, contain a pair of centrioles. Centrioles duplicate at a specific point in the cell cycle, typically around the beginning of DNA replication. The term "division center" is also used in biology to refer to the centriole.123

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  1. centriole
  2. division center
  3. cell - Mitosis and cytokinesis

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