What organs are included in the central nervous system?
| March 9, 2021 | education
The central nervous system is composed of the brain and spinal cord. The brain sends messages through the spinal cord and nerves to control muscle movement and the functioning of internal organs. The main working unit of the nervous system is a cell called a neuron. The human brain contains about 100 billion neurons, which are made up of a cell body containing a nucleus and special extensions called axons and dendrites. Neurons communicate with each other using axons and dendrites.
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