Created by: Arlene Barrett, Dennis Bratton, Mariah Gumphry, Haley Vrazel

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The Ruminant Digestive System(Day 3)

• Created by Arlene Barrett, Dennis Bratton,
  Mariah Gumphry, Haley Vrazel

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Objectives

• Compare the last two components of ruminant
  animals.
• Analyze the importance of small and large
  intestines for ruminant animals.

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Ruminant Digestive Systems

• Omasum - section that is round and muscular.
• Grinds the food material and prepares the food
  material for chemical breakdown.
• Has many folds in its lining, often said to look
  like the pages of a book
• Reduces particle size of digesta even further
• Some absorption starts to take place here

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Omasum - full
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Ruminant Digestive Systems

• Abomasum - very similar to the stomach of
  non-ruminants.
• this is where the majority of chemical breakdown
  of food material occurs.
• The true stomach of the ruminant animal
• Enzyme secretion takes place here
• Acts like a monogastric stomach
• Produces HCl, Pepsinogen/pepsin for digestion
• Also produces lipase in early stages of life
• Also produces mucus for protection

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Abomasum inside view
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Ruminant Digestive Systems

• Small Intestine - where most of the food material
  is absorbed into the bloodstream
• Contains three sections
• duodenum
• jejunum
• ileum

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Ruminant Digestive Systems

• The food material is continually squeezed as it
  is moved through the small intestine, becoming
  more solid.
• The majority of the food material absorption
  occurs in the duodenum and the jejunum.

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Ruminant Digestive Systems

• Large Intestine - begins to prepare unused food
  material for removal from the body
• a portion of the large intestine in some animals
  contain pouches that may contain enzymes for
  further species-specific digestion (horses and
  rabbits (cecum)).

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Ruminant Digestive Systems

• Colon - collects the unused food material that is
  to be removed from the body
• Rectum - poop chute
• Anus - opening through which the waste is
  removed.
• Controlled by sphincter muscles, that also help
  protect the opening.

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Review

• Compare the last two components of ruminant
  animals.
• Analyze the importance of small and large
  intestines for ruminant animals.

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Reources

• Resources Rakowitz-McMillian Sam Houston State
  University Animal Science Note Packet