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**The Digestive System (((Serosa, the Muscular layer), (Submucosa),…
**The Digestive System 
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from outermost to innermost the serosa (also called the peritoneum), the muscular layer, the submucosa, and the mucosa. Table 30-1 describes these four layers of the digestive tract wall.
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Three types of digestive enzymes: protease, amylase, and lipase.
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