Lecture 7 Sep-29-11 Chapter 12

Lecture 7 Sep-29-11 Chapter 12 - Ch-12 Neural...

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Unformatted text preview: Ch-12 Neural Tissue9/29/2011Bio 2870 A & PIntroduction to Anatomy and PhysiologyChapter 12 Neural TissueCh-12 Neural Tissue9/29/2011Bio 2870 A & P2An Introduction to the Nervous SystemThe Nervous SystemIncludes all neural tissue in the bodyNeural TissueContains two kinds of cellsNeurons: cells that send and receive signalsNeurons perform all communication, information processing, and control functions of the nervous system Neuroglia (glial cells): cells that support and protect neuronsNeuroglia preserve physical and biochemical structure of neural tissue and are essential to survival and function of neuronsCh-12 Neural Tissue9/29/2011Bio 2870 A & P3NEURAL TISSUECELL TYPES A.NEURONS B. NEUROGLIACh-12 Neural Tissue9/29/2011Bio 2870 A & P4An Introduction to the Nervous SystemOrgans of the Nervous SystemBrain and spinal cordSensory receptors of sense organs (eyes, ears, etc.)Nerves connect nervous system with other systemsDivisions of the Nervous SystemAnatomical DivisionsCentral nervous system (CNS)Peripheral nervous system (PNS)Ch-12 Neural Tissue9/29/2011Bio 2870 A & P5Divisions of the Nervous SystemThe Central Nervous System (CNS)Consists of the spinal cord and brain Contains neural tissue, connective tissues, and blood vesselsFunctions of the CNSAre to process and coordinate:sensory data: from inside and outside bodymotor commands: control activities of peripheral organs (e.g., skeletal muscles)higher functions of brain: intelligence, memory, learning, emotionAnatomical DivisionsCentral nervous system (CNS)Peripheral nervous system (PNS)Ch-12 Neural Tissue9/29/2011Bio 2870 A & P6Divisions of the Nervous SystemThe Peripheral Nervous System (PNS)Includes all neural tissue outside the CNSFunctions of the PNSDeliver sensory information to the CNS Carry motor commands to peripheral tissues and systemsNerves (also called peripheral nerves)Bundles of axons with connective tissues and blood vessels Carry sensory information and motor commands in PNS: cranial nerves connect to brainspinal nerves attach to spinal cordAnatomical DivisionsCentral nervous system (CNS)Peripheral nervous system (PNS)Ch-12 Neural Tissue9/29/2011Bio 2870 A & P7Divisions of the Nervous SystemFunctional Divisions of the PNSAfferent divisionCarries sensory information From PNS sensory receptors to CNSEfferent divisionCarries motor commandsFrom CNS to PNS muscles and glandsReceptors and effectors of afferent divisionReceptors: detect changes or respond to stimulineurons and specialized cells complex sensory organs (...
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Lecture 7 Sep-29-11 Chapter 12 - Ch-12 Neural...

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