The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. © VectorMine / Shutterstock.com The nervous system includes both the Central nervous system and Peripheral nervous system.

Human nervous system, system that conducts stimuli from sensory receptors to the brain and spinal cord and conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main parts: the central nervous system (the brain and spinal cord) and…

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Nerves – Neural tissue that conducts electrical impulses (messages) from the brain and spinal cord to all other parts of the body; also conveys sensory information from the body to the central nervous system. Nerve root – The initial portion of a spinal nerve as it originates from the spinal cord.

The central nervous system is composed of the spinal cord and the brain , The spinal cord is a cylindrical cord from which the spinal nerves extend , The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter .

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Spine and Nerves. Many nerves of the peripheral nervous system, which transport signals to and from specific parts of the body, meet the spinal cord at the vertebral column. Other roles for the vertebrae include helping support the body’s weight and providing an anchor for the ribs. The typical adult has 33 total vertebrae,…

The spinal cord does not run through the lumbar spine (lower back). After the spinal cord stops in the lower thoracic spine, the nerve roots from the lumbar and sacral levels come off the bottom of the cord like a “horse’s tail” (named the cauda equina) and exit the spine.

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Nervous System. The nervous system has two major parts: the central nervous system (CNS) and the peripheral nervous system (PNS ). The central system is the primary command center for the body, and is comprised of the brain and spinal cord. The peripheral nervous system consists of a network of nerves that connects the rest of the body to the CNS.

Structural Divisions of the Nervous System. The nervous system can be divided into two major regions: the central and peripheral nervous systems. The central nervous system (CNS) is the brain and spinal cord, and the peripheral nervous system (PNS) is everything else (Figure 8.2).

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Motor messages to the spinal nerves originate in the brain. The motor strip (homunculus) in the brain initiates a command for muscle control. This command is sent to the spine through nerve impulses and then travels through the motor root to the spinal nerve.

These are muscle movement, sensation, and autonomic functions (control of internal organs). Because their function is so well understood, when a particular spinal nerve becomes impaired, the resulting deficit often pinpoints which spinal nerve or nerves are affected. Motor messages to the spinal nerves originate in the brain.

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Sympathetic Nervous System. This part of your autonomic system is in charge of your body’s “fight or flight” response. When you come across a threat, your sympathetic nervous system kicks into gear, quickly changing body processes like your breathing and heart rate so that you have extra energy and are ready to face the danger or run away.

Nervous System. The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts.

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The peripheral nervous system consists of 12 pairs of cranial nerves and 31 pairs of spinal nerves.

This allows the brain and spinal cord to both receive and send information to other areas of the body. In this way, it allows us to react to environmental stimuli. In the peripheral nervous system information is transmitted by bundles of nerve fibers or axons.

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The anatomy of the nervous system in humans consists of the brain and spinal cord, along with the primary sense organs and all the nerves associated with these organs. The brain and the spinal cord form the central nervous system (CNS). All other neuronal tissue is brought under the umbrella of the peripheral nervous system (PNS).

The central nervous system is made up of the brain, the spinal cord and even the retina, and it is directly responsible for the translation of the messages sent by the peripheral nervous system, which is the network of nerves that run throughout the body.

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