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Nervous Tissue.pdf - Nervous system Practical...

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Nervous systemPractical class-HistologyLecturer: Ghada Abdul Rahman Sultan
Nervous systemReceive stimuli from both internal andexternal environments which are thenanalyses and integrated to produceappropriate coordinated responses invarious effector organs.
Nervous system2 body systems control all the functionsof the body-1. Nervous system- which works veryrapidly2. Endocrine system- which works moreor less slowly.
Classification of nervous systemFunctionally/physiologically:1. Somatic nervous system (SNS)2. Autonomic nervous system (ANS)a-sympathaticb-parasympathaticAnatomically and histologically:1-a Central nervous system (CNS)(brain and spinal cord)1-b Peripheral nervous system (PNS)(cranial and spinalnerves with their ganglia )
The basic structureunits innervoussystem :1- Neurons (nervecell)2- Supporting cellsa-Neuroglia (in CNS)b-Schwann cell(inPNS)Figure 12.4aDendritesSomaNucleusNucleolusAxonNode of RanvierInternodesSynaptic knobsAxon hillock

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