Centriole
From Biocrawler, the free encyclopedia.
A centriole in biology is a barrel shaped microtubule structure found in most animal cells, and cells of fungi and algae though not frequently in plants. The walls of each centriole are composed of nine triplet microtubules or, in the case of Drosophila, nine doublet microtubules. The microtubules which make up the centriole are very stable and are acetylated.
Two centrioles are arranged perpendicularly in the centre of the centrosome.
Centrioles are important in the cell division process, organizing the mitotic spindle upon which the chromosomes are pulled apart. Some animal cells may be able to divide their chromosomes without centrioles, for instance in female meiosis. Centrioles assist the cell through the process of mitosis and in male meiosis.
External link
- Medical Engineer - Centrioles are not Autonomous (http://tissue.medicalengineer.co.uk/Plastids+and+Mitochondria+are+Autonomous+but+Centrioles+are+Not.php)
- Electron microscopic images of centrioles (http://www.uni-mainz.de/FB/Medizin/Anatomie/workshop/EM/EMCentriolE.html)
| Organelles of the cell |
|---|
| Chloroplast | Mitochondrion | Centriole | Endoplasmic reticulum | Golgi apparatus | Lysosome | Myofibril | Nucleus | Peroxisome | Ribosome | Vacuole | Vesicle |
pl:Centriola pt:centríolo vi:Trung tử
