The cytoskeleton is a complex network of protein filaments that provides structural support, shape, and movement within cells. It is made up of three main types of filaments: actin filaments, microtubules, and intermediate filaments. The cytoskeleton plays a crucial role in cell division, cell motility, and maintaining cell shape. It also participates in intracellular transport, organelle positioning, and cell signaling. Research in this area aims to understand the dynamics and regulation of the cytoskeleton, as well as its role in various cellular processes and diseases.