The digestive system is one of the most important systems in the human body. ...
Regulators control the digestive process. The major hormones that take over the functions of the digestive system are produced and released by cells in the mucous of the stomach and the small intestine. These are let out in to the blood of the digestive tract, go back to the heart and through the arteries, then go back to the digestive system, where they stimulate digestive juices and cause organ movement.
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