The three types of fibre that make up the cytoskeleton are microtubules, intermediate filaments and:

1. The cytoskeleton is a network of protein fibres running through the cell. 2. There are three types of fibre within it. 3. They are microfilaments, intermediate filaments and microtubules. 4. Cilia and flagella are surface projections, and plasmodesmata are plant cell junctions. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 4 'Cell Structure', sections 4.1-4.6_