1. 체신경계(SNS: somatic nervous system)는 피부(skin), 골격근(skeletal muscle), 뼈(bone) 등에 분포한다. The somatic nervous system(SNS) is located in skin and skeletal muscles, bones. 2. 자율신경계(ANS: autonomic nervous system)는 교감신경계와 비교감신경계, 장신경계로 세분된다. The autonomic nervous system(ANS) has three branches: the sympathetic nervous system, the parasympathetic nervous system and the enteric nervous system. 3. 중추신경계(C..