In non-muscle cells, F-actin and myosin-II form small contractile bundles that are smaller and less organized than muscle fibers. In epithelial cells, these contractile bundles arrange parallel to the cell membrane as adherence or circumferential belts, connecting adjacent adherens junctions. Adherence belts help maintain the stability and structural integrity of epithelial cells. In macrophages, F-actin and myosin arrange into compact bundles called stress fibers. During phagocytosis, the stress bundles rearrange to engulf and internalize foreign particles and pathogens. Stress fibers also bind with integrins, which are connected to the extracellular matrix, helping the cells attach to surrounding surfaces. In dividing cells, septin rings recruit actin and myosin, forming a temporary structure called a contractile ring that helps in cytokinesis. The ring-like structure forms in the middle of the cell dividing the cytoplasm to form two daughter cells.