The cytoskeleton is a network of protein filaments and tubules that provides structural support to cells. It helps maintain the cell's shape, enables movement, and organizes the internal components. The main components of the cytoskeleton include microfilaments, intermediate filaments, and microtubules, each playing distinct roles in cellular functions. In addition to providing support, the cytoskeleton is crucial for processes like cell division and intracellular transport. It helps transport organelles and vesicles within the cell, ensuring that essential materials are delivered where needed. Overall, the cytoskeleton is vital for maintaining cellular integrity and facilitating various cellular activities.