Final answer:
Microtubules are the cytoskeletal structures that act as tracks for long-distance intracellular transport.
Step-by-step explanation:
The cytoskeletal structure that provides tracks for long-distance intracellular transport is the microtubules. Microtubules are composed of alpha and beta-tubulin protein monomers that form hollow cylinders. These cylinders guide organelle movement within the cell and are essential components in maintaining the cell's shape, enabling vesicle transport, and facilitating cell division by forming the mitotic spindle. Additionally, microtubules make up the structure of cilia and flagella, which are involved in cellular movement.