1. Bio 449 Lecture 31 – Digestive Physiology III Nov. 22, 2010
Function and control of the GI tract (conclusion) Transport Carbohydrates and amino acids Fats Water recovery Defecation
Terms to Know Portal system Hepatic portal vein Mass movement Internal anal sphincter External anal sphincter
Readings
Lectures 29-31: Chapter 21

2. Hepatic circulatory patterns
Aorta
Hepatic vein
Inferior vena cava
Digestive tract arteries
Hepatic portal vein
Hepatic artery
Capillaries of liver
Capillaries of digestive tract: stomach, intestines, pancreas, and spleen
Liver
Fig

3. Large intestine Fig. 21-30 Rectum Internal anal sphincter Anus
External anal sphincter
Cecum
Appendix
Ileum
Ileocecal valve
Ascending colon
Transverse colon
Aorta
Hepatic portal vein
Inferior vena cava
Descending colon
Sigmoid colon
Haustra
Tenia coli
Circular muscle
Longitudinal layer (tenia coli)
Intestinal glands
Lymphoid nodule
Submucosa
Muscularis externa
Muscularis mucosae
Fig

4. Anal sphincters Rectum Internal anal sphincter External anal sphincter
Anus
External anal sphincter
Fig

5. Fluid secretion and reabsorption
7.5 L from small intestine
1.4 L from large intestine
0.1 L in feces
9.0 L removed from lumen
2.0 L food and drink
1.5 L saliva (salivary glands)
0.5 L bile (liver)
2.0 L gastric secretions
1.5 L pancreatic secretions
1.5 L intestinal secretions
9.0 L Total input into lumen
Absorption
Excretion
Fluid input into digestive system
Fluid removed from digestive system
Ingestion
Secretion
Fig. 21-1