Describe the structure of the following with the help of labelled diagrams.
Centrosome

Explanation

Centrosome : Centrosome is an organelle usually containing two cylindrical structures called centrioles. They are surrounded by amorphous pericentriolar materials. Both the centrioles in a centrosome lie perpendicular to each other in which each has an organisation like cartwheel. They are made up of nine evenly spaced peripheral fibris of tubulin. Each of the peripheral fibril is a triplet. The adjacent triplets are linked. The central part of the centriole is also Protein aceous and called the .hub., which is connected with tubules of the peripheral triplets by radial spokes made of protein. The centrioles form the basal body of cilia and flagella and spindle fibres that give rise to spindle apparatus during cell diversion in animal cells.