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.
The lower end of the digestive tract is called the rectum and anus. It is here that one controls the waste products (feces) of the digestive system. The internal and external anal sphincters enable one to sense a bowel movement and they act as final valves to hold stool until one is ready to evacuate.