The autonomic nervous system (ANS) is a division of the peripheral nervous system that influences the function of internal organs. The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system some textbooks also include sensory systems.Īutonomic nervous system Unlike the CNS, the PNS is not protected by the bone of spine and skull, or by the blood–brain barrier, which leaves it exposed to toxins and mechanical injuries. The main function of the PNS is to connect the central nervous system (CNS) to the limbs and organs, essentially serving as a communication relay going back and forth between the brain and spinal cord with the rest of the body. The peripheral nervous system (PNS) is the part of the nervous system that consists of the nerves and ganglia on the outside of the brain and spinal cord. "12.1 Basic Structure and Function of the Nervous System". Somatic, Autonomic and Enteric Structures of the Nervous System.īetts, JG Young, KA Wise, JA Johnson, E Poe, B Kruse, DH Korol, O Johnson, JE Womble, M DeSaix, P (April 25, 2013). ![]() The central nervous system is so named because it integrates information it receives from, and coordinates and influences the activity of, all parts of the bodies of bilaterally symmetric animals - that is, all multicellular animals except sponges and radially symmetric animals such as jellyfish - and it contains the majority of the nervous system. ![]() The central nervous system ( CNS) is the part of the nervous system consisting of the brain and spinal cord. ![]() Divisions of the nervous system Central nervous system
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