Colon - Anatomy & Physiology - Flashcards

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Question Answer Article
What are the three parts of the colon?
  • Ascending, transverse and descending
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On which side of the cranial mesenteric artery does the ascending colon pass?
  • Right in a caudal to cranial direction
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On which side of the abdomen does the descending colon lie?
  • Left, then passes more medially before entering the pelvic cavity
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Name the process that produces VFAs?
  • Microbial fermentation
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Which layer of the intestinal wall is incomplete?
  • Lamina muscularis
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Name the three parts of the ruminant ascending colon.
  • Ansa proximalis; ansa spiralis; and ansa distalsis
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What is the shape of the ansa spiralis in small ruminants?
  • Cone
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In ruminants, what does the descending colon do before entering the pelvic cavity?
  • It has a sigmoid flexure
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How do the ox and horse differ in their development of the ascending colon?
  • Ox - developing ascending colon expands caudally around the root of the mesentry. Horse - developing ascending colon expands cranially around the root of the mesentry.
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What shape does the pig's ascending colon have?
  • A cone with clockwise centripetal turns and anti - clockwise centrifugal turns
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How many taenia does the pig's ascending colon have?
  • Centripetal turns have two, centrifugal turns have none
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