ANAT 100 Lecture Notes - Lecture 5: Central Nervous System, Arachnoid Mater, Dense Irregular Connective Tissue

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Nervous system- includes the following: brain, spinal cord, sensory organs, and all the nerves that connect these organs to the rest of the body. Can be divided into structural or functional categories. Functions in sensory input, integration, and motor output. Two distinct cell types from nervous tissue: neurons: excitable cells, generate, transmit, and receive nerve impulses (electrical signals, glial cells (supporting cells): non excitable cells, support and protect neurons by surrounding and wrapping neurons. Neurons are the basic structural unit of the nervous system: conduct nerve impulses from one part of the body to another. Dendrites: short, smaller processes that branch off the cell body: conduct nerve impulses toward the cell body, receive input and transfers it to cell body for processing. Axon (nerve fiber): typically longer nerve cell process emanating from cell body: neurons have one or no axon, transmit nerve impulses away from cell body toward another cell, transmit output information to other cells.

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