Livestock Digestive Systems

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Livestock Digestive Systems

• Modified by Georgia Agricultural Education
  Curriculum Office
• July 2002

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Ruminant Digestive System

• Objectives
• Know the four parts of the ruminant stomach.
• Know examples of animals that have a rumen.
• Be able to describe the function of all four of
  the parts of the ruminant stomach.

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What are some animals that have Rumens?

• ?

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Cattle
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Sheep
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Goats
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Deer
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Elk
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What do all of these animals have in common?

• They all live off of grass, and other roughages.

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Why cant we live off of the same things cows eat?

• CELLULOSE

LIGNIN
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How can a Ruminant digest these things?

• Through the process of rumination
• Eating rapidly, regurgitating and masticating
  their feed. (Chewing their cud)
• With specialized structures in their stomach
• Ruminants have microorganisms living in them that
  break down cellulose for them and make those
  nutrients absorbable.

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What are these four structures?
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Rumen

• Large fermentation vat
• Microorganisms break down cellulose
• Creates lost of gases (methane)
• Ruminants have to be able to eructate (belch)
• Some nutrients are absorbed
• Roughages are reduced in size

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Rumen Feed Storage
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Rumen (Punch)
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Reticulum

• Collects objects that shouldnt be in the
  digestive system.
• Nails
• Screws
• Baling wire
• Magnets are placed into many dairy animals
  reticulums.

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Reticulum (Hardware Stomach or Tripe)
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Omasum

• Works to remove water from the food
• Absorbs fatty acids

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Omasum (manyplies)
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Abomasum

• Glandular Stomach (like yours)
• Secretes digestive juices.
• Breaks down food stuff further for absorption.
• Absorbs some nutrients.

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Abomasum (True Stomach)
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Order that food moves.

• Rumen
• Reticulum
• Omasum
• Abomasum
• Hint to remember Alphabetically back-words.
• Ru Re O A

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Review

• Give me an example of an animal that has a rumen?
• Name the four compartments of the ruminant
  stomach?
• What does a rumen help and animal break down that
  we cant?
• What are the common names of the four parts of
  the ruminant stomach?

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Nice Work!Now on to the assignment!