postganglionic fibers

Postganglionic fibers are nerve fibers that carry signals from the autonomic nervous system's ganglia to target organs or tissues. After a nerve signal reaches an autonomic ganglion (a relay station), the postganglionic fibers extend from there to deliver instructions that regulate functions like heart rate, digestion, and blood vessel constriction. These fibers are part of involuntary nervous control, meaning they manage body processes automatically without conscious effort, maintaining homeostasis and responding to the body's needs.