Stomach Digestion
- Chief Cells Secrete Pepsinogen
- Pepsinogen Turned to Pepsin By H+
- Protein Breakdown Begins
- Mucous Cells Secrete Mucus and Bicarbonate
- G Cells Secrete Gastrin
- Gastrin Stimulates Parietal Cell HCl Release
- Parietal Cells Secrete Intrinsic Factor
Small Intestine Digestion
- Brush border enzymes
- Pancreatic Enzymes are secreted via a Duct
- Pancreas secretes bicarbonate
- Brush Border activates Pancreatic Trypsin
- Trypsin activates Chymotrypsin
- Trypsin and Chymotrypsin digest Proteins
- Gallbladder Releases Bile
- Pancreatic Lipase breaks down Lipids
- Goblet cells secrete mucus
- Pancreatic Amylase breaks down Carbohydrates
- Pancreatic Nucleases breakdown DNA/RNA
- Digestion occurs in the Duodenum
GI Absorption
- Stomach
- Alcohol
- Duodenum
- Iron
- Jejunum
- Folate
- Terminal Ileum
- Vitamin B12
- Bile Resorption
Midgut Structures, Blood Supply and Innervation
- Distal Duodenum
- Jejunum
- Ileum
- Appendix
- Ascending Colon
- Proximal 2/3 of Transverse Colon
- Superior Mesenteric Artery
- Vagus Nerve
- Lesser Splanchnic Nerve
Hindgut Structures, Blood Supply and Innervation
- Distal 1/3 of Transverse Colon
- Descending Colon
- Sigmoid Colon
- Rectum
- Pectinate (Dentate) Line
- Urogenital Sinus
- Inferior Mesenteric Artery
- Lumbar Splanchnic Nerves
- Pelvic Splanchnic Nerves
Foregut Structures, Blood Supply and Innervation
- Esophagus
- Lower Respiratory Tract
- Stomach
- Proximal Duodenum
- Liver
- Gallbladder
- Pancreas
- Spleen
- Celiac Artery
- Vagus Nerve
Large Intestine
- Colon
- Electrolyte Reabsorption
- Water Reabsorption
- Microflora Produce Vitamins
- Rectum Stores Feces