Intramural ganglia are clusters of nerve cell bodies located within the walls of certain organs, primarily in the digestive system. They are part of the autonomic nervous system, specifically the parasympathetic division, which helps regulate involuntary functions such as digestion and heart rate. These ganglia play a crucial role in controlling the activity of smooth muscles and glands in the organs they inhabit. By processing signals from the central nervous system, intramural ganglia help coordinate complex reflexes and maintain homeostasis within the body.