Intermediate filaments are a type of protein structure found in the cells of animals, plants, and fungi. They provide mechanical support and help maintain the shape of the cell. Unlike other cytoskeletal elements, such as microtubules and actin filaments, intermediate filaments are more stable and resistant to stretching, making them essential for the structural integrity of tissues. These filaments are made up of various proteins, including keratins in skin cells and neurofilaments in nerve cells. They play a crucial role in anchoring organelles and connecting cells to each other, contributing to the overall strength and resilience of tissues in the body.