Livestock Digestive Systems 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. What are some animals that have Rumens? ? Cattle Sheep Goats Deer Elk What do all of these animals have in common? • They all live off of grass, and other roughages. Why can’t we live off of the same things cows eat? 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. What are these four structures? 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 Rumen Feed Storage Gas Today’s Hay Yesterday’s Feed Rumen (Punch) Reticulum • Collects objects that shouldn’t be in the digestive system. – Nails – Screws – Baling wire • Magnets are placed into many dairy animals reticulums. Reticulum (Hardware Stomach or Tripe) Omasum • Works to remove water from the food • Absorbs fatty acids Omasum (manyplies) Abomasum • Glandular Stomach (like yours) • Secretes digestive juices. • Breaks down food stuff further for absorption. • Absorbs some nutrients. Abomasum (True Stomach) Order that food moves. • • • • Rumen Reticulum Omasum Abomasum Hint to remember Alphabetically back-words. Ru Re O A 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 can’t? What are the common names of the four parts of the ruminant stomach? Nice Work! Now on to the assignment!
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