1. The Avian Digestive System By Gemma Dalena

2. Overview of Information Presented:
The Avian Digestive System
Parts of the Avian Digestive System
Esophagus
Stomach
Small Intestine
Large Intestine
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3. Information Guide All Information Provided by this PowerPoint
Presentation can be found on the at:
Under the California Agriculture Core Curriculum Animal Science
Animal Physiology –(CLF3201) The Digestive Process
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4. The Avian Digestive System
This digestive system is adapted for grinding hard or encased (shells of seeds) food.
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5. Parts of the Avian Digestive System
The Mouth
Saliva is secreted to moisten food and aid in swallowing since avian species do not have teeth.
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6. The Esophagus The Esophagus connects the mouth to the stomach.
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7. The Esophagus
has a modification which is called the "crop" where food is stored and further moistened
Crop
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8. The Avian Stomach Consists of Two Parts:
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9. The Avian Stomach Consists of two parts.
1.The "proventriculus" which provides digestive secretions.
Proventriculus
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10. The Avian Stomach
2. The "gizzard" which is located after the proventriculus, it is very muscular and is used for grinding food.
Gizzard
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11. Parts of the small intestine
The small intestine varies in length depending on the diet. It is longer in herbivores (plant eating birds) and shorter in carnivores (flesh eating birds).
Part of the small intestine
Parts of the small intestine
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12. The Small Intestine
The functions of the small intestine are similar to the small intestine of ruminants and monogastrics
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13. The Large Intestine
The functions of the large intestine are similar to the small intestine of ruminants and monogastrics.
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14. The Large Intestine Ruminants
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15. The Large Intestine Monogastrics
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16. The Large Intestine
The "cloaca" which, is located at the terminal end of the large intestine is a chamber into which the urinary and genital canals open.
Large Intestine
cloaca
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17. The Large Intestine
At the junction of the small and large intestine is where the two "ceca" pouches are located.
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18. The Large Intestine Ceca Pouch Ceca Pouch
The two ceca pouches further contribute to aiding in fiber digestion and absorption.
Ceca Pouch
Ceca Pouch
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