The cytoskeleton is a cellular organelle that provides structure to the cell. The cytoskeleton shapes and supports the cell with a network of microtubules. Microtubules in the cytoskeleton are arranged throughout the cytoplasm as beams holding the shape of the cell.
Humans have a skeletal structure made of bone that holds the contents of the body together. In the same way that human bodies are held together by a skeleton, cells are held together by a cytoskeleton.