The Nervous System and the Brain
The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body. It is essentially the body’s electrical wiring. Structurally, the nervous system has two components: the central nervous system and the peripheral nervous system which includes the nerves that extend from the brain and the spinal cord. The brain of an average-sized adult weighs about three pounds, yet the amount of information it contains is amazing!
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