Centrioles are found in eukaryotic cells, which are found only in animal cells and a few lower plants. They are also found in male gametes of land plants, seed plants and higher plants such as ferns and club mosses. However, these cells are absent in conifers, angiosperms and most fungi.
A majority of centrioles are composed of nine sets of microtubule triplets, which are long, hollow cylinders that are part of the cytoskeleton found in the cytoplasm. Microtubules are involved in a number of cellular processes such as chromosome separation and the movement of organelles.
Centrioles play an important role in cell division and cellular organization, particularly organizing the microtubule in the cytoplasm.