The combination of nerve and muscle tissue is fundamental to most animals because it enables them to move rapidly in response to stimuli.
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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.
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.