Efferent fibers are nerve fibers that carry signals away from the central nervous system (CNS) to various parts of the body. They are primarily involved in transmitting motor commands, which help control muscle movements and glandular activities. These fibers play a crucial role in the body's response to stimuli, enabling actions such as walking, talking, and reflexes. In the peripheral nervous system, efferent fibers can be classified into two main types: somatic and autonomic. Somatic efferent fibers control voluntary movements by innervating skeletal muscles, while autonomic efferent fibers regulate involuntary functions, such as heart rate and digestion, by influencing smooth and cardiac muscles.