Mucosa

innermost layer made up of epithelial, connective, and smooth muscle tissue that protects, secretes, and absorbs

Submucosa

loose connective tissue, blood vessels and nerves that nourishes and transports

Muscular layer

smooth muscle that moves contents of the tube

Serosa

outermost layer made up of epithelial and connective tissue that protects

Parasympathetic impulses

increase activities of digestive system

Sympathetic impulses

inhibit certain digestive actions

Pancreatic amylase

splits glycogen into disaccharides

Pancreatic lipase

breaks down triglycerides

Trypsinogen, chymotrypsinogen, and carboxypeptidase

digest proteins

Nucleases

digest nucleic acids

Bicarbonate ions

make pancreatic juice alkaline

Gastrin

causes the release of gastric juice

Somatostatin

inhibits the release of HCl

Cholecystokinin

inhibits the release of gastric juice, causes the release of bile

Secretin

causes the release of pancreatic juice