Dr Iram Tassaduq CONTENTS Ovaries Uterine tubes Uterus Cervix Vagina.
Dr Iram Tassaduq Rapid communicating system of body carrying electromagnetic impulses Integrates...
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NERVOUS SYSTEM
Dr Iram Tassaduq
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NERVOUS SYSTEM Rapid communicating system of body carrying electromagnetic impulses
Integrates the information that it receives from, and coordinates the activity of, all parts of the bodies
Performs higher mental functions
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NERVOUS SYSTEM
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COMMONLY USED TERMS Gray Matter It is the collection of nerve cell
bodies in central nervous system
White Matter In the central nervous system, the
gathering of nerve fibers is called white matter.
Tracts Bundle of nerve fibers connecting
nuclei
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. .
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CENTRAL NERVOUS SYSTEM(CNS)
Brain and Spinal cord
95% of total neural tissue
Perform integration and coordination
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• ALL OF NEURAL TISSUE OUTSIDE CNS
• Links CNS with all of body tissues & outside world
PERIPHERAL NERVOUS SYSTEM
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COMPOSITION OF NERVOUS SYSTEMThe two principal cell types of the
nervous system are: NEURONS • Functional unit• Excitable cells that transmit electrical
signals• Arranged in an integrated network SUPPORTING CELLS • Non conducting cells• Cells that surround and wrap neurons• In the CNS called Neuroglia/Glia• In the PNS Schwann cells and Satellite
cells
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NEURON CLASSIFICATION
STRUCTURAL Unipolar single, short process
Bipolar two processes (axon and dendrite)
Multipolar three or more processes
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. .
(MOTOR/INTERNEURONS)
(SENSORY)(RETINA/GANGLIA OF VESTIBULOCOCHLEAR N)
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NEURON CLASSIFICATION FUNCTIONAL Sensory (afferent) transmit impulses toward the CNS
Motor (efferent) carry impulses away from the CNS
Interneurons (association neurons) shuttle signals through CNS pathways
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FUNCTIONAL CLASSIFICATION
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SUPPORTING CELLS
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