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muscle cell-an elongated contractile cell that forms the muscles of the body. muscle fiber, muscle fibre. fibre, fiber-any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber).
muscle. the contractile tissue that effects the movement of and within the body. Muscle tissue in the higher animals is classified as striated, smooth, or cardiac, according to its structure and function. Striated, or skeletal, muscle forms the bulk of the body's muscle tissue and gives the body its general shape.n muscle cells myosin is arranged in long filaments called thick filaments that lie parallel to the microfilaments of actin...... Click the link for more information. . Actin and myosin interact before muscle contraction, forming the contractile material actomyosin.