Once home, I googled autism awareness, bumper sticker, and entered a whole world of autism products. Bumper stickers, of course. But also tee shirts, jewelry, stickers (I am someone with autism), mugs. Eventually, I exited even more perplexed than I entered.
In general, the digestive system is controlled by both nerves and hormones. The nerves that control digestion are in the submucosa layer of the tissue and in between the muscle layers of the walls of the organ.
These organs include the pancreas, the liver and the gallbladder, as well as several different glands. Without the aid of the accessory organs of the digestive system, digestion would not occur within the stomach or small intestine. Each organ and gland plays a very specific role in the system. In this way, they are as essential to the process as the main organs where digestion actually takes place.