GI Tract Secretions and Fluid Absorption

Dietary Input and Digestive Secretions:

 • Food and drink: 2000 mL

 • Saliva: 1500 mL

 • Gastric secretions: 1500 mL

 • Liver (bile): 1000 mL

 • Pancreas (pancreatic juice): 1000 mL

 • Intestinal secretions: 2000 mL

 • Colonic mucous secretions: 200 mL

Water Reabsorption:

 • Small intestine reabsorbs 7800 mL

 • Colon reabsorbs 1250 mL

 • 150 mL lost in feces



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