The splanchnic nerves are a group of nerves that originate from the spinal cord and are part of the autonomic nervous system. They primarily carry visceral sensory information and autonomic motor signals to the internal organs, particularly those in the abdominal and pelvic regions. These nerves play a crucial role in regulating functions such as digestion and blood flow. There are several types of splanchnic nerves, including the greater splanchnic nerve, lesser splanchnic nerve, and least splanchnic nerve. Each of these nerves innervates specific organs, such as the stomach, liver, and kidneys. By transmitting signals between the spinal cord and these organs, splanchnic nerves help maintain homeostasis within the body.