Basal BodyEach cilium or flagellum has a basal bodylocated at its base.Basal bodies anchor the cilia or flagella and are thought to be responsible for their formation.Basal bodies contain triplets of microtubules along the periphery but do not have central microtubules (9 + 0).They look like centrioles (discussed below) and are believed to be derived from them.Centrioles and CentrosomeThe structure of centrioles is similar to that of basal bodies in that they have 9 triplets of microtubules. Centrioles occur in pairs; each one oriented at a right angle to the other.Centrioles are contained within a structure called a centrosome. The centrosome and centrioles are involved in the formation of the microtubules.Actin Filaments (Microfilaments)Actin filaments are long, thin fibers composed of 2 chains of protein wrapped around each other.They occur in bundles or meshlike networks which provide mechanical support and determine the shape of the cell.
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