Efferent nerve fibers are specialized pathways in the nervous system that carry signals away from the central nervous system (CNS) to various parts of the body. These fibers are crucial for initiating actions, such as muscle contractions and glandular secretions. They play a key role in the body's response to stimuli, allowing for movement and other functions. These fibers are part of the peripheral nervous system (PNS) and can be further classified into somatic and autonomic fibers. Somatic fibers control voluntary movements, while autonomic fibers regulate involuntary functions, such as heart rate and digestion. Together, they ensure the body responds appropriately to internal and external changes.