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A&P 1 CH 12-14
Dr. Cutler SU-Nervous Tissue-Spinal Cord/Nerves-Brain/Crainal Nerves
nervous system | keeps controlled conditions with limits that maintain life |
central nervous system | brain and spinal cord |
peripheral nervous system | all the nervous tissue outside of the brain and spinal cord |
sensory-in; motor-out | CNS |
PNS components | nerves, ganglia, centric plexus(guts) |
PNS divisions | somatic & autonomic |
cranial nerve pairs | 12 |
spinal nerve pairs | 31 |
somatic | controls body and is voluntary |
autonomic | involuntary functions like sweating, heart rate, and flight or fight |
PNS divisions | sensory & motor |
sensory | viscera(organs) |
motor | involuntary |
sympathetic | fight, freeze, or flight |
parasympathetic | rest & digest |