What is a networkof threadlike protiens within a cell

The cytoskeleton is a network of threadlike proteins that are found in all eukaryotic cells. It extends throughout the cytoplasm through a very complex network of interlinking filaments and tubules. All organisms that are eukaryotic have the same cytoskeleton structure that is composed of three different proteins. These proteins are capable of assembling and disassembling depending on the cell’s requirements at given periods.  

The cytoskeleton is responsible for maintaining the shape of the cell. When particles move in and out of the cell, the cytoskeleton stabilizes the surrounding tissues of the cells to prevent deformation.