Enteroendocrine cells are specialized cells found in the lining of the gastrointestinal tract. They play a crucial role in digestion by producing and releasing hormones in response to food intake. These hormones help regulate various functions, including appetite, digestion, and insulin secretion. These cells are distributed throughout the stomach, small intestine, and large intestine. Each type of enteroendocrine cell secretes specific hormones, such as gastrin, secretin, and cholecystokinin. By communicating with other cells and organs, enteroendocrine cells help maintain the body's overall metabolic balance.