Excretion dischargeofmetabolicwasteproductsfromour

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Unformatted text preview: er cecum Fundus of Stomach pancreas Pylorus of stomach The muscles act like a drawstring that contract the colon into little pouches. These pouches are called HAUSTRA. The material that reaches the colon is undigested and/or undigestable. Bacteria live in the colon. These are important for the synthesis of Vit. B12 and K. Other bacteria are responsible for destroying the “bad” bacteria. E. coli is an example The sphincter ani is an involuntary smooth muscle. The DEFECATION REFLEX which is kept in control by the sigmoid flexure and peristaltic activity. When peristalsis occurs the sphincter ani relaxes. An EXTERNAL SPHINCTER (skeletal muscle) can oppose the sphincter ani. This allows you to “hold it in” until you find a bathroom! The first part and part of the second third of the esophagus are also made of skeletal muscle. The rest of the GI tract is smooth muscle. Transverse Colon col Ascending on cecum appendix Haustra Tenia coli Descending Colon Terminal Ileum Si co gmo lon id rectum Anal Canal 1. Small Intestine 6. Transverse Colon 2. THE Mesentary 7. Descending Colon 3. Ileum 8. Sigmoid Colon 4. Cecum 9. Mesocolon 5. Ascending Colon 10. Greater Omentum Types of Hernia Some Definitions Some Definitions Secretion ­ discharge of materials synthesized by cells. Excretion ­ discharge of metabolic waste products from our cells. Occurs at skin, sweat glands, lungs, feces, and kidneys. 5 functions: 1. Detoxification of blood Liver Liver 2. Carbohydrate metabolism ­glyco...
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This homework help was uploaded on 04/04/2014 for the course BIOL 1300 taught by Professor Dr.ilyasapozhnikov during the Fall '08 term at University of Texas at Dallas, Richardson.

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