神经系统 The Nervous System
神 经 系 统 The Nervous System
Nervous system Central Peripheral nervous nervous system system Spinal Motor Brain Sensory cord pathways pathways Voluntary Autonomic (somatic nervous nervous system system Sympathetic Parasympathetic division aViSiOn FIGURE 51.3 The divisions of the vertebrate nervous system. The major divisions are the central and peripheral nervous systems
Introduction The nerous tissue of animals responds to stimuli within and outside of the bod Incoming information is integrated and a response is made. The nerve net response is muscle contraction or secretion by a gland. The end hydra result is the naintenance of boay functions or homeostasis
Introduction Sensory Neuron Motor Neuron Sensory Receptor Central Nervous Muscle or Gland System Effector Most animals have a central nervous system to process incoming information and direct a response. this diagram summarizes the direction of information flow
统 神经系统的基本结构 §神经元( Neuron):神经元是神经系统的基本结构和功能单位 细胞核 细胞体{线粒体 尼尔体( Nissl's bodies) 神经元 树突( dendrites) 突起 轴突(axon) 施旺细胞( Schwann cells):在外周神经系统(PNS)构成髓鞘; 少突胶质细胞( Oligodendrocytes):在中枢神经系统(CNS)构成髓鞘; 髓鞘( myelin sheath); 郎飞氏结( Ranvier nodes)
一、神经系统的基本结构 § 神经元(Neuron):神经元是神经系统的基本结构和功能单位。 第七节 神经系统 神经元 细胞体 突 起 树突(dendrites) 轴突(axon) 细胞核 线粒体 尼尔体(Nissl’s bodies) 施旺细胞(Schwann cells):在外周神经系统(PNS)构成髓鞘; 少突胶质细胞(Oligodendrocytes):在中枢神经系统(CNS)构成髓鞘; 髓鞘(myelin sheath); 郎飞氏结(Ranvier nodes)