Size: 7nm Made from: polymers of actin Roles: Give support and mechanical strength, keep cell shape and enable movement

Intermediate filaments

Size: 10nm Made from: variety of proteins Roles: Anchor nucleus, extend between membranes


Size: 18-30nm Made from: tubulin Roles: Form tracks for motor proteins (dyein and kinesin) to walk and drag organelles.

Overview in Organelles