parasympathetic, sympathetic, central, autonomic, peripheral, enteric, somatic
central nervous system
receiving, processing, and responding to sensory information
peripheral nervous system
network of nerves that runs throughout the head, neck, and body; it carries messages to and from the central nervous system
autonomic nervous system
regulates involuntary physiologic processes including heart rate, blood pressure, respiration, digestion, and sexual arousal
enteric nervous system
can control gastrointestinal behaviour independently
sympathetic nervous system
responding to dangerous or stressful situations; fight-or-flight
parasympathetic nervous system
conserves energy to be used later and to regulate bodily functions like digestion and urination; rest-and-digest
somatic nervous system
responsible for voluntary actions such as scratching an itch