A<unk>  is a<unk>  (branching network) of intersecting nerves. A<unk>  is composed of afferent and efferent fibers that arise from the merging of the anterior rami of spinal nerves and blood vessels. There are five spinal<unk> es, except in the thoracic region, as well as other forms of autonomic<unk> es, many of which are a part of the enteric nervous system. The nerves that arise from the<unk> es have both sensory and motor functions. These functions include muscle contraction, the maintenance of body coordination and control, and the reaction to sensations such as heat, cold, pain, and pressure. There are several<unk> es in the body, including: *Spinal<unk> es *Cervical<unk>  - serves the head, neck and shoulders *Brachial<unk>  - serves the chest, shoulders, arms and hands *Lumbosacral<unk>  *Lumbar<unk>  - serves the back, abdomen, groin, thighs, knees, and calves *Sacral<unk>  - serves the pelvis, buttocks, genitals, thighs, calves, and feet *Pudendal<unk>  *Coccygeal<unk>  - serves a small region over the coccyx *Autonomic<unk> es *Celiac<unk>  (solar<unk>  - serves internal organs *Auerbach's<unk>  (myenteric<unk>  - serves the gastrointestinal tract *Meissner's<unk>  (submucosal<unk>  - serves the gastrointestinal tract *Pharyngeal<unk>  of vagus nerve - serves the palate and pharynx *Cardiac<unk>  - serves the heart
Nerve plexus
Nerve fascicle
Sensory nerve
Nerve hook
Cranial nerves
Neurovascular bundle
Muscle spindle
Cardiopulmonary nerves