13. Describe the structure of the following with the help of labelled diagrams.
(ii) Centrosome
Centrosome
The structure of centrosome is made up of two cylindrical structures called centrioles. These centrioles show a cartwheel like organisation and both lie perpendicular to each other. A centriole is made up of microtubule triplets that are evenly spaced in a ring The adjacent triplets are linked together. A proteinaceous hub is present in the central part of a centriole. The hub is attached to triplets by means of radial spokes. Centrioles help in the organisation of spindle fibres. It also forms the basal body of cilia and flagella.