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.
Various parts of the digestive tract secrete many enzymes and fluids. This page is a comprehensive list of those secretions, their source, and their functions. 1  Enzymes speed up digestive processes to make digestion faster. 2  Hormones can stimulate digestion, and the release of hormones into the organs.