The cytoskeleton is a series of intercellular proteins that help a cell with shape, support, and movement. Cytoskeleton has three main structural components: Micro-filaments, intermediate filaments, and micro tubules. Micro tubules are composed of tubulin proteins and are used by cells to hold their shape . They are also major component of cilia and flagella. Micro-filaments are thinner and are made of actin proteins. They help cells to change their shapes.