First seen under a light microscope
Some bacteria have flagella and these look like EUKARYOTIC UNDULIPODIA,but their INTERNAL STRUCTURE is very different.
In EUKARYOTES (organisms that have cells with nuclei)
- Unduliphodia and Cilia are structually the same however, Undulipodia are LONGER than cilia . (Cilia are short- around 10 micrometres long)
- Unduliphodia usually occur in ones or twos in a cell, whereas cilia often occur in large numbers on a cell
- Hair-like extensions that stick out from the surface of cells.
- each- made up of a cylinde that contains NINE MICROTUBLULES ARRANGED IN A CIRCLE
- There are also TWO MICROTUBULES in a central bundle
UNDIPODIUM that forms the tail of a sperm, can move a whole cell.
UNDIPODIUM AND CILIA can move because the microtubules can use energy from ATP made in respiration