Centrosome and Centrioles

What is a Centrosome ?

The centrosome is the microtubule organizing center (MTOC) of eukaryotic animal cells. uIt consists of two centrioles that are at right angles with respect to one another and which are embedded in a mass of protein.

Located in close proximity to the nucleus, the centrosome is involved in the formation of the mitotic spindle fibers that separate the chromosomes during cell division. uCentrosomes are organelles which are not membrane bound, located near the nucleus and serve as a mitotic center in animal cell. uThe centrosome is also involved in creating and extending the microtubules that constitute the cytoskeleton.

Centrosome is a small region of a cytoplasm that produces microtubules in animal cells. uBefore an animal cell divides, the centrosome including the centrioles double and the two new centrosomes move to opposite ends of the cell.

Centriole

The centrosome contains a pair of centrioles which are a cylindrical array of nine triplet microtubules connected by special fibers. This pattern is commonly known as the 9 – 3 microtubule pattern. uSo, we see that centriole is a specialized type of microtubule.

Top View & 3-D View of a Centriole

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