part of part_of organ 器官 brain 大脑 (...) at some stage of its development, every chordate exhibits five uniquely derived characters or synapomorphies of the group: (...) (4) a single, tubular nerve cord that is located dorsal to the notochord (...) (reference 1); The neural tube is destined to differentiate into the brain and spinal cord (the central nervous system) (reference 2).[well established][VHOG] AAO:0010478 ABA:Brain BAMS:Br BAMS:Brain BILA:0000135 BTO:0000142 CALOHA:TS-0095 Cavitated compound organ which is comprised of gray and white matter and surrounds the cerebral ventricular system.[TAO] DHBA:10155 EFO:0000302 EHDAA2:0000183 EHDAA:2641 EHDAA:6485 EMAPA:16894 EV:0100164 FBbt:00005095 FMA:50801 GAID:571 HBA:4005 MA:0000168 MAT:0000098 MBA:8 MBA:997 MESH:D001921 MIAA:0000098 OpenCyc:Mx4rvVjT65wpEbGdrcN5Y29ycA PBA:3999 Part of the central nervous system situated within the cranium and composed of both nerve cell bodies and nerve fibers.[AAO] TAO:0000008 The brain is the center of the nervous system in all vertebrate, and most invertebrate, animals. Some primitive animals such as jellyfish and starfish have a decentralized nervous system without a brain, while sponges lack any nervous system at all. In vertebrates, the brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing, balance, taste, and smell[WP]. The part of the central nervous system contained within the cranium, comprising the forebrain, midbrain, hindbrain, and metencephalon. It is derived from the anterior part of the embryonic neural tube (or the encephalon). Does not include retina. (CUMBO) UBERON:0000955 UMLS:C0006104 UMLS:C1269537 VHOG:0000157 XAO:0000010 ZFA:0000008 encephalon encephalon galen:Brain http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=21 requires review for applicability to invertebrate structures, e.g. synganglion suprasegmental levels of nervous system suprasegmental levels of nervous system suprasegmental structures suprasegmental structures synganglion synganglion the brain the brain uberon (...)在其发展的某个阶段，每种脊索动物都表现出该组的五个独特的衍生特征或突触：(...)(4)位于脊索(...)背侧的单个管状神经索(参考1)； 神经管注定要分化为大脑和脊髓（中枢神经系统）（参考文献2）。[well established][VHOG] 上环节组织 上环节组织 中枢神经系统的一部分，位于头盖骨内，由神经细胞体和神经纤维组成。[AAO] 大脑 大脑 大脑是所有脊椎动物和大多数无脊椎动物的神经系统的中心。一些原始动物，如水母和海星，有一个分散的神经系统，没有脑，而海绵根本没有任何神经系统。在脊椎动物中，大脑位于头部，由头骨保护，靠近视觉、听觉、平衡、味觉和嗅觉的主要感觉器官[WP]。 头盖骨包含在头盖骨内的中枢神经系统的一部分，其包括前脑、中脑、后脑和脑下颅。它来源于胚胎神经管（或脑）的前部。不包括视网膜。（CUMBO） 脑 脑 腔隙性复合器官，由灰质和白质组成，包围着脑室系统。 超音段层次的神经系统 超音段层次的神经系统 集合神经节 集合神经节 需要审查对无脊椎动物结构的适用性，例如集合神经节 central nervous system 中枢神经系统 ectoderm-derived structure 外胚层衍生结构 organ 器官 central nervous system 中枢神经系统