Dr. David Lyness
AUTONOMIC SYSTEMThe parasympathetic system is responsible for stimulation of "rest-and-digest" or "feed and breed". Activities that occur when the body is at rest, especially after eating, including sexual arousal, salivation, lacrimation, urination, digestion and defecation.
The sympathetic nervous system's primary process is to stimulate the body's fight-or-flight response. It is, however, constantly active at a basic level to maintain homeostasis.
SOMATIC NERVOUS SYSTEM
The SoNS consists of afferent nerves and efferent nerves. Afferent nerves are responsible for relaying sensation from the body to the central nervous system (CNS); efferent nerves are responsible for sending out commands from the CNS to the body, stimulating muscle contraction; they include all the non-sensory neurons connected with skeletal muscles and skin.
CRANIAL NERVES HAVE BOTH AUTONOMIC AND SOMATIC FUNCTIONS
Sources Wikipedia,: Pearson & Benjamin Cummings - all images