Definition: Microtubules are fibrous, hollow rods, that function primarily to help support and shape the cell. They also function as routes along which organelles can move. They are typically found in all eukaryotic cells and are a component of the cytoskeleton, as well as cilia and flagella.
Examples:Microtubules play a huge role in movement within a cell. They form the spindle fibers that manipulate and separate chromosomes during mitosis. Examples of microtubule fibers that assist in cell division include polar fibers and kinetochore fibers.