![]() ![]() ![]() Axons and dendrites allow neurons to communicate, even across long distances.ĭifferent types of neurons control or perform different activities. Bundles of axons, called nerves, are found throughout the body. A neuron has a cell body, which includes the cell nucleus, and special extensions called axons (pronounced AK-sonz) and dendrites (pronounced DEN-drahytz). The human brain contains about 100 billion neurons. The basic unit of the nervous system is a nerve cell, or neuron. In this way, the nervous system’s activity controls the ability to move, breathe, see, think, and more. The nervous system transmits signals between the brain and the rest of the body, including internal organs. ![]() The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.The central nervous system is made up of the brain and spinal cord. ![]()
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