CENTROSOME STRUCTURE ,CHEMICAL COMPOSITION AND FUNCTIONS

A centrosome is a complex organelle in animal cells that organizes microtubules and regulates cell division. It's a key part of cellular function and is involved in many processes, including cell shape, polarity, and cilia formation.

1. CENTROSOMES Dr.Ravirala Naresh,Asst.Professor of Zoology

2. CENTROSOMES Van beneden-1887 Cell centre Important in cell division +eukaryotic cells,lower plants- algae,fungi,bryophytes,ferns,gymnosperms - angiosperms,prokaryotes,diatoms,yeast non flagellate &non ciliate protozoans Dr.Ravirala Naresh,Asst.Professor of Zoology

3. STRUCTURE Located near nucleus ,centre Metazoa -outside nucleus,protozoa -inside Cylindrical 0.15-0.25 µ dia,0.3-2.0µ length Two components Centro sphere Centrioles Dr.Ravirala Naresh,Asst.Professor of Zoology

4. CENTRIOLE 1 or 2 darkly stained granules- centrioles Interphase one Cell division-2 Right angles Cart wheel structure Wall-nine triplet microtubules-A,B,C Dr.Ravirala Naresh,Asst.Professor of Zoology

5. CHEMICAL COMPOSITION Tubulin protein Lipid ATPase enzyme Dr.Ravirala Naresh,Asst.Professor of Zoology

6. FUNCTIONS Mitotic spindle Basal bodies/ kinetosome Distal centriole of sperm-axial filament Dr.Ravirala Naresh,Asst.Professor of Zoology