1. Microtubules: These are hollow tubes made of the protein tubulin. They are involved in:

* Cell shape and structure: They provide rigidity and support to the cell.

* Cell division: They form the mitotic spindle, which separates chromosomes during cell division.

* Organelle transport: They act as tracks for motor proteins, which move organelles around the cell.

* Cilia and flagella: They form the internal structure of cilia and flagella, which are involved in movement.

2. Microfilaments: These are thin, solid rods made of the protein actin. They are involved in:

* Cell shape and structure: They help to maintain the cell's shape and provide support.

* Cell movement: They are responsible for muscle contraction and other forms of cell movement.

* Cytoplasmic streaming: They help to move organelles and other substances around the cytoplasm.

* Cell division: They form the contractile ring, which pinches off the cytoplasm during cell division.

3. Intermediate filaments: These are rope-like fibers made of various proteins, depending on the cell type. They are involved in:

* Structural support: They provide strength and support to the cell.

* Anchoring organelles: They help to anchor organelles in place.

* Cell-cell junctions: They help to connect cells to each other.

So, to answer your question, all three of these components - microtubules, microfilaments, and intermediate filaments - are part of the cytoskeleton.