Final answer:
Accessory organs of digestion produce digestive enzymes and aid in nutrient breakdown. They are regulated by hormones in response to food consumption.
Step-by-step explanation:
Accessory organs of digestion, such as the liver, pancreas, and gallbladder, play a crucial role in the process of digestion by producing digestive enzymes and aiding in the breakdown of nutrients. These organs secrete substances that are essential for chemical digestion and are regulated by hormones in response to food consumption. They are called accessory organs because food does not pass through them, but they contribute to the overall functioning of the digestive system.