Prevertebral ganglia are clusters of nerve cells located in front of the vertebral column, primarily associated with the autonomic nervous system. They play a crucial role in the sympathetic division, which is responsible for the body's "fight or flight" response. These ganglia are involved in regulating various functions, including digestion and blood flow. The main prevertebral ganglia include the celiac ganglion, superior mesenteric ganglion, and inferior mesenteric ganglion. Each of these ganglia innervates specific organs in the abdomen and pelvis, helping to control processes such as gastric secretion and intestinal motility.