As part of the cellular cytoskeleton, the main function of microfilaments
is to aid the cell in its motility, both intracellular and extracellular.
Intracellular motility includes the movement of vesicles throughout the
cell, the movement of organelles through the cytoplasm, and such complex
processes as phagocytosis, which is the uptake of materials from outside
the cell, and cytokinesis, the process of cell division in mitosis.
Related Organelles: Microtubules