The signal that passes along the nerve fibre is called a nerve impulse. It enables communication between nerve cells and controls muscle movement and responses.
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An individual nerve cell may be up to a metre long.
The two main types of processes that arise from the neuron’s cell body are a single long part called the axon and many short, branched parts called dendrites.
The cells of the nervous tissue are called nerve cells or neurons.
The brain, spinal cord, and nerves are composed of nervous tissue.