Central nervous system (CNS) Perifial Nervous system (PNS)

The aflutter constitution contains of nerve cells and axons. Neurons argon responsible for receiving and transmission electrochemical signals. Axons atomic number 18 long fibers of the neuron that carryout efferent nerves (messages). The neuron sends an electrical message from its body by elan of the axon. all(prenominal) neuron has an axon (Pinel, 2008). The peripheral restless system (PNS) and the primal nervous system (CNS) ar similar because they both live of neurons and axons. The differences lie in the anatomy of the neurons and axons. The CNS has sets of neurons called nuclei (singular nucleus) and bundles of axons are called tr drop a motions. The PNS has sets of neurons called ganglia (singular ganglion) and sets of axons called nerves. another(prenominal) difference is the areas of the systems: The CNS consists of two divisions; the encephalon and spinal anesthesia corduroy. The PNS overly has two divisions; the somatic nervous system and the autonomic ne rvous system, which is found outside the skull and spine (Pinel, 2008). As stated, the central nervous system consists of the brain and spinal cord. The brain receives its input from the senses of the spinal cord and its own nerves (i.e. olfactory and optic nerves). Its applications are to passageing and initiating a proper travel response. The spinal cord sends sensory information to the brain.

When message is received, the spinal cord hence sends motor information to other part of the body (i.e. pinched and cardiac muscles, glands). Within the CNS are the glial cells, they act as insulation for the neurons. The re are three types; astrocytes ( do overpow! er chemicals from blood to CNS neurons), oligodendrocytes (myelinate axons), and microglia (aid in responding to injury or illness ? part of immune system). Myelination is the process of producing myelin sheathes (coverings on axons, which help the effectiveness of the axonal transmission) (Pinel, If you indirect request to get a encompassing essay, order it on our website: BestEssayCheap.com

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