The Nervous System

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The nervous system is critical for human survival. The human nervous system is responsible for signaling bodily functions, sensory experiences, and information processing. The nervous system consists of three major structures: the brain, the spinal cord, and the peripheral nervous system (Brodal 1-18). The brain, spinal cord, and peripheral nerves are responsible for different processes and have unique structures. The brain is divided into three substructures: the cerebrum, cerebellum, and brain stem (Nieuwenhuys, and et al). The spinal cord is a bundle of nervous tissue that extends from the brain; the spinal cord and brain together compose the central nervous system (CNS). The peripheral nervous system are the nerves that are outside of the CNS, and are responsible for connecting the CNS to organs and the limbs of the human body (Brodal 1-18). Although each structure is unique, they all consist of nerve cells called neurons, which are considered the building blocks of the nervous system and are composed of dendrites and a single axon (Gartner and Hiatt 186-218). The structure of the neuron empowers the nervous system to interpret all incoming information, such as a smell, pain, or taste, and is responsible for sending critical nerve information that initiates such functions as breathing and heart rate, all of which are essential to human vitality. The nervous system consists of three major structures: the brain, the spinal cord, and the peripheral nerves. The brain is
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