thin filament


ac·tin fil·a·ment

one of the contractile elements in muscular fibers and other cells; in skeletal muscle, the actin filaments are about 7.5 nm wide and 1 mcm long, and attach to the transverse Z filaments. Synonym(s): thin filament

thin filament

In a sarcomere, one of the collection of contractile filaments made primarily of actin, seen microscopically.