SYMPATHETIC NERVOUS SYSTEM



Most preganglionic fibres of the sympathetic division arise from the middle or thoraciclumbar portion of the spinal cord and almost immediately terminate in the ganglia that lie near the cord. Therefore, in this division, the preganglionic fibre is short, but the postganglionic fibre that makes contact with an organ is long. The sympathetic division is especially important during emergency situations when an individual is required to fight or take flight.

It accelerates the heartbeat and dilates the bronchi; which makes glucose and oxygen readily available to active muscles. 0n the other hand, the sympathetic division inhibits the digestive tractdigestion; which is not an immediate necessity when one is under attack

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