text: The<unk>  <unk>  (or visceral<unk>  system) is the part of the peripheral<unk>  system that acts as a control system, maintaining homeostasis in the body.  These maintenance activities are primarily performed without conscious control or sensation.  The<unk>  has far reaching effects, including: heart rate, digestion, respiration rate, salivation, perspiration, diameter of the pupils, micturition (the discharge of urine), and sexual arousal.  Whereas most of its actions are involuntary, some<unk>  functions work in tandem with the conscious mind, such as breathing.  Its main components are its sensory system, motor system (comprised of the parasympathetic<unk>  system and sympathetic<unk>  system), and the enteric<unk>  system.
  The<unk>  is a classical term, widely used throughout the scientific and medical community. Its most useful definition could be: the sensory and motor neurons that innervate the viscera. These neurons form reflex arcs that pass through the lower brainstem or medulla oblongata. This explains that when the central<unk>  system (CNS) is damaged experimentally or by accident above that level, a vegetative life is still possible, whereby cardiovascular, digestive and respiratory functions are adequately regulated.
option_0: Autonomic nervous system
option_1: Sympathetic nervous system
option_2: Parasympathetic nervous system
option_3: Circulatory system
option_4: Vestibular system
option_5: Cerebral circulation
option_6: Lymph vascular system
option_7: Coronary circulation