Microtubules- Definition, Structure, Functions and Diagram


Microtubules Definition Microtubules are found in the cytoplasm of all types of eukaryotic cells with rare absence, such as in human erythrocytes. They are tiny, hollow, bead-like tubular structures that help cells maintain their shape. They are microscopic hollow tubes found inside cells that also provide motor functions for the cell. Figure: Diagram of Microtubules Structure of Microtubules They are long fibers (of indefinite length) about 24 nm in diameter. In cross-section, each microtubule appears to have a dense wall … Read more

Cytoskeleton- Definition, Structure, Functions and Diagram


Cytoskeleton Definition The cytosol of cells contains fibers that help to maintain cell shape and mobility and that probably provide anchoring points for the other cellular structures. Collectively, these fibers are termed as the cytoskeleton. The cytoskeleton gives cells structure and shape and allows them to move around. It’s also important for intracellular transport.  At least three general classes of such fibers have been identified in eukaryotic cells.  Each of these filaments is a polymer. All three filament systems are … Read more