Stomach lining

By Levi Clancy for Student Reader on
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Although not a gland, it is important to note that the stomach lining secretes gastrin, a peptide, into the stomach. Gastrin promotes digestion by stimulating release of digestive juices and stimulates stomach movements that mix food and digestive fluids. The stomach lining is part of the exocrine system, which operates via ducts like sweat and the digestive enzyme described above.