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Specialized Digestive Systems What are they? • Animals with specialized digestive tracts are still non-ruminant animals but they have unique organs that allow them to efficiently process the food they consume Hindgut Fermenters • Non-ruminant herbivores that have a functioning cecum that allows them to eat large amounts of roughage – Horses – Rhinos – Elephants – Rabbits – Guinea Pigs Bird Systems • Beak – Mouth which pecks and scoops feed • Salivary Glands – Add digestive enzymes and lubricate feed • Esophagus – Connects beak to the crop • Crop – Storage pouch that moistens feed Bird Systems • Proventriculus – Glandular stomach that adds gastric juices and mixes and churns feed • Gizzard – Purplish colored organ that contains grit to grind feed during muscle contractions • Small Intestine – Digests and absorbs nutrients Bird Systems • Large Intestine – Absorbs water • Ceca – 2 blind pouches that do not function at the end of the large intestine • Cloaca – Internal sphincter that controls excretion • Vent – External sphincter that controls excretion Bird Systems Small Intestine Large Intestine Ceca Cloaca Beak Salivary Glands Liver Gall Gizzard Bladder Esophagus Crop Pancreas Proventriculus Vent Bird Systems Mouth which pecks and scoops feed Bird Systems Glandular stomach that adds gastric juices and mixes and churns feed Bird Systems Absorbs water Bird Systems Add digestive enzymes and lubricate feed Bird Systems Purplish colored organ that contains grit to grind feed during muscle contractions Bird Systems 2 blind pouches that do not function at the end of the large intestine Bird Systems Connects beak to the crop Bird Systems Digests and absorbs nutrients Bird Systems Internal sphincter that controls excretion Bird Systems Storage pouch that moistens feed Bird Systems External sphincter that controls excretion Bird Systems Bird Systems Bird Systems Bird Systems