Microfilaments are tiny, thread-like structures found in the cells of living organisms. They are part of the cell's cytoskeleton, which provides support and shape to the cell. Made primarily of a protein called actin, microfilaments play a crucial role in various cellular processes, including movement and division. They help cells change shape and enable muscle contraction in animals. In addition to their structural role, microfilaments are involved in transporting materials within the cell. They work alongside other components of the cytoskeleton, such as microtubules and intermediate filaments, to ensure that the cell functions properly. This teamwork is essential for maintaining the overall health and efficiency of the cell.