DS Part 5: Large Intestine

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8 Terms

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Main Functions of Large Intestine

  • movements through haustra

  • propulsive movements

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Order of colons

ascending colon

transverse colon

descending colon

sigmoid colon

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Haustra

saclike segments that appear on large intestine from contractions

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cecum and proximal colon

When the proximal colon is filled with feces, the ileocecal sphincter will contract

  • prevents reflux back into the ileum

  • water absorption

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distal colon

feces are semi-solid and move slowly

  • propels to rectum

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gastrocolic reflex

presence of food in stomach = increases motility in colon

  • rapid parasympathetic component

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main functions of the colon

  • absorption of water and electrolytes

  • storage of stool

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composition of feces

  • 30% of dead bacteria = odor

  • 10-20% inorganic matter

  • 2-3% protein

  • 30% of undigested product