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The Nervous System

Across
an enclosed, cable-like bundle of axons
an action that is performed as a response to a stimulus
surround neurons and provide support and insulation between them
nerve cells within the nervous system responsible for converting external stimuli from the organism's environment into internal electrical impulses
a nerve cell whose cell body is located in the spinal cord
a long, thin, tubular bundle of nervous tissue and support cells
Down
the basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells
any process that living things use to actively maintain fairly stable conditions necessary for survival
a signal transmitted along a nerve fiber
an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals