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AN test 2
Question | Answer |
---|---|
Functions of large intestine? | reabsorption of water, compaction of intestinal contents into feces, absorption of important vitamins produced by bacteria,and Storage of fecal material prior to defecation |
Cecum | Is an expanded pouch Receives material arriving from the ileum Stores materials and begins compaction Appendix is attached to posteromedial surface of cecum and is dominated by lymphoid nodules (a lymphoid organ) |
Colon | The largest portion Haustra (pouches) permit expansion and elongation of colon Three longitudinal bands of smooth muscle (taeniae coli) Ascending Colon to Transverse Colon to the Descending Colon to the Sigmoid Colon |
rectum | Is an expandable organ for temporary storage of feces Movement of fecal material into rectum triggers urge to defecate The anal canal is the last portion of the rectum |
Histology of large intestine | Lack villi Abundance of mucous cells Presence of distinctive intestinal glands Are deeper than glands of small intestine Are dominated by mucous cells |
histology of large intestine 2 | Does not produce enzymes Provides lubrication for fecal material Large lymphoid nodules are scattered throughout the lamina propria and submucosa |
Physiology of the Large Intestine | Less than 10% of nutrient absorption occurs in large intestine Prepares fecal material for ejection from the body |