The Nervous System- Nervous Tissue

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Presentation transcript:

The Nervous System- Nervous Tissue

The Nervous system has three major functions: Sensory – monitors internal & external environment through presence of receptors Integration – interpretation of sensory information (information processing) Motor – response to information processed through stimulation of effectors muscle contraction glandular secretion

General Organization of the nervous system Two Anatomical Divisions Central nervous system (CNS) Brain Spinal cord Peripheral nervous system (PNS) All the neural tissue outside CNS Afferent division (sensory input) Efferent division (motor output) Somatic nervous system Autonomic nervous system

Histology of neural tissue Two types of neural cells in the nervous system: Neurons - For processing, transfer, and storage of information Neuroglia – For support, regulation & protection of neurons

Neuron structure

Classification of neurons Structural classification based on number of processes coming off of the cell body:

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