Key to Cytoskeletal Functions (1Structure and Support 2) Intracellular Transport (3)Contrac面y and Motility y(4)Spatial Organization Actin filaments Actin faments 2 31 Motorroten Intermediate Microtubdle flament Intermediate flaments Nerve cell 时 Motor proten Actin fiaments Microtubule 2 2 Microtubule Motor proten 3 a Epithelial cell d Dividing cell