The somatic nervous system is a part of Peripheral Nervous System. It controls the voluntary functions of the body through skeletal muscles. There are two types of nerves in the somatic nervous system: afferent (sensory) nerves and efferent (motor nerves). Afferent nerves relay information from the body to the central nervous system. It primarily relays sensory information like pain. smell, etc. Efferent nerves relay information from the central nervous system to the body. Somatic Nervous System consists of two parts: cranial nerves and spinal nerves. Cranial nerves are responsible for carrying information to and fro from the brain stem. Spinal nerves carry information to and fro from the spinal cord.