**The Digestive System
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The Four Layer Walls
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.
Salivary Glands
Serosa
Submucosa
Mucosa
the Muscular layer
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Tongue
Sublingual
Submandibular
Parotid gland
Parotid duct
Pharynx
Esophagus
Fundus is the upper portion of stomach
Spleen sit's to the left of the stomach
Body- Middle portion of stomach
Three types of digestive enzymes: protease, amylase, and lipase.