For both ameboid movement and cytokinesis the mechanism seems to be assembly-disassembly. These can even associate into higher level structures such as centrioles, flagella, and cilia. Microtubules are what makes up the spindle apparatus during mitosis and meiosis, they are the moving parts of cilia and flagella, they also make up centrioles and basal bodies . Spindle apparatus is made of microtubules. The structure that pulls chromosomes into two new cells.
Some tubules go from pole to pole and lengthen during mitosis and meiosis.
Other microtubules strands go from the chromosomal centromere to the pole and shorten. Control mechanisms of this process are unknown. Centrioles Often found as a perpendicular pair near the nucleus. Nine triplets of microtubules as seen in a cross sectional view. Centrioles are very closely analogous to basal bodies and there is evidence that basal bodies develop from centrioles.