What is the main function of intermediate filaments in a cell?

Intermediate filaments play a crucial role in maintaining the structural integrity of a cell. Their primary function is to provide mechanical strength and support, helping to resist tension and prevent overstretching. This is especially important in cells that are subject to mechanical stress, such as epithelial and muscle cells.

By forming a dense network within the cytoplasm, intermediate filaments help anchor organelles in place and contribute to the overall architecture of the cell. This structural support is vital for maintaining the shape of the cell and ensuring that it can withstand various stresses, both physical and environmental, thereby contributing to the overall stability of tissues.

While other structures in the cell, like microtubules and microfilaments, have more dynamic roles related to movement or the transport of materials, the primary role of intermediate filaments is to provide resilience and durability, enabling cells to function effectively without being easily damaged.