12 Comparitive Digestion

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12 Comparitive Digestion

  1. 1. Comparative Digestion Herbivores (non-ruminants & ruminants), Carnivores, Nectar & Pollen feeders.
  2. 2. Herbivores <ul><li>… are designed to be able to consume the most indigestible foods. </li></ul><ul><li>… can be divided in to two distinct categories: </li></ul><ul><li>Hindgut fermenters (non-ruminants) </li></ul><ul><li>Foregut fermenters (ruminants) </li></ul>
  3. 3. Hindgut Fermenters <ul><li>These animals have a very long and well developed large intestine (specifically the caecum) containing vast amounts of bacteria to aid digestion. </li></ul>
  4. 4. Foregut Fermenters <ul><li>…are called RUMINANTS as their major adaptation is an enlarged part of the oesophagus / stomach called the RUMEN. </li></ul>
  5. 5. Ruminant Digestion 1 <ul><li>Food is chewed and swallowed </li></ul><ul><li>Bacterial fermentation in the rumen breaks down plant cellulose </li></ul><ul><li>Food passes to the reticulum and is packaged in to wads and pushed back up the oesophagus to be re-chewed. </li></ul>
  6. 6. Ruminant Digestion 2 <ul><li>Food returns to the omasum </li></ul><ul><li>Food continues to the abomasum which is the equivalent of our stomach. </li></ul><ul><li>Here food is digested with stomach acids and other enzymes before passing to the small intestine. </li></ul>
  7. 7. Scatology <ul><li>… is the study of poo, you can tell a lot about an animal from what it leaves behind. </li></ul>

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