2. Centrosome
The centrosome is a bundle of microtubules and other proteins responsible for the formation of microtubules and growth of the mitotic spindle during cell division.
There are two parts to the centrosome: i) Centrioles : Pair of microtubule bundles lined perpendicular to each other
ii) Pericentriolar material : microtubule rings that make up/ form the mitotic spindle
3. Cilia and Flagella
Cilia and flagella are microtubule (hair-like) extensions that project from the plasma membrane to allowmovement of substances over the surface of the cell, as well as movement of the cell through ECF. (Ex: Respiratory tract – sweeps foreign particles away from the lungs – CF creates excess mucus interfering with the cilia function)
i)
Cilia : Short hair like tubules of the plasma membrane
ii) Flagella : small tail like projection in order to propel the sperm cell
4. Ribosomes
Ribosomes are the organelles responsible for protein synthesis. They are bundles of protein, and RNA that can exist either free in cytosol or bound to other organelles. (Synthesise Proteins)
i. Free Ribosomes: Freely floating, produces proteins in cytoplasm
29
Made with FlippingBook Publishing Software