The cytoskeleton is a network of protein filaments and tubules that provides structure and shape to a cell. It plays a crucial role in maintaining the cell's integrity, allowing it to withstand mechanical stress. The cytoskeleton is also involved in various cellular processes, such as cell division and movement. There are three main components of the cytoskeleton: microfilaments, intermediate filaments, and microtubules. Microfilaments are thin strands that help with cell shape and movement, while intermediate filaments provide strength. Microtubules are hollow tubes that assist in transporting materials within the cell and are essential during mitosis, the process of cell division.