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The nervous system is part of the animal's body that coordinates the actions of the animal and transmits signals between different parts of it's body.
It consists of two main parts: the CNS (central nervous system) and the PNS (peripheral nervous system)
The CNS contains the brain and the spinal cord. The brain is located inside the skull and connected to the spinal cord, moving down the neck.
The PNS consist mainly of nerves, which are long fibers that connect the CNS to every other part of the body.
At the cellular level, the nervous system is defined by the presence of a special type of cell called the neuron also known as the "nerve cell".
Neurons have special structures that allow them to send signals rapidly and precisely to other cells.
They send these signals in the form of electro-chemical waves traveling along thin fibers called axons, which cause chemicals called neurotransmitters to be released at junctions called Synapses.
The synapses is where the nerves impulses are transmitted and received.
The axons transmit the nerve impulse away from the cell.
The receptors receive an impulse and pass it along to the other parts of the neuron.