hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells From Wikipedia, the free encyclopedia
Microtubules are found in biological cells as a part of the cytoskeleton. They are hollow tubes whose walls consist of 13 columns of tubulin molecules. Its main functions are to maintain a cell's shape, cell motility, chromosome movement in cell division, and organelle movement. They look like hollow noodles which transmit signals to our nerves[1][2]
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