A. Axoneme: The core of cilia and flagella is called the axoneme, which possesses a number of microtubules running parallel to the long axis . B. Cartwheel pattern: Centrioles have an organisation like the cartwheel, consisting of nine evenly spaced peripheral fibrils of tubulin protein . C. Crista: The inner membrane of mitochondria forms a number of infoldings called the cristae towards the matrix . D. Satellite: Sometimes a few chromosomes have non-staining secondary constrictions at a constant location, giving the appearance of a small fragment called the satellite .