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The Avian Digestive System By Gemma Dalena
Overview of Information Presented:
The Avian Digestive System Parts of the Avian Digestive System Esophagus Stomach Small Intestine Large Intestinehttp://www.calaged.org/ResourceFiles/Curriculum/advcluster/3000.htm
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Information Guide
All Information Provided by this PowerPoint
Presentation can be found on the at:
http://www.calaged.org/ResourceFiles/Curriculum/advcluster/3000.htm
Under the California Agriculture Core Curriculum Animal Science
Animal Physiology –(CLF3201) The Digestive Process
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The Avian Digestive System
This digestive system is adapted for grinding hard or encased (shells of seeds) food.
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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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The Esophagus The Esophagus connects the mouth to the stomach.
Esophagus
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The Esophagus
has a modification which is called the "crop" where food is stored and further moistened
Crop
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The Avian Stomach
Consists of Two Parts:
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The Avian Stomach Consists of two parts.
1.The "proventriculus" which provides digestive secretions.
Proventriculus
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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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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).
Parts of the small intestine
Part of the small intestine
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The Small Intestine
The functions of the small intestine are similar to the small intestine of ruminants and monogastrics
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The Large Intestine
The functions of the large intestine are similar to the small intestine of ruminants and monogastrics.
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The Large Intestine
Ruminants
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The Large Intestine
Monogastrics
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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.
cloaca
Large Intestine
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The Large Intestine
At the junction of the small and large intestine is where the two "ceca" pouches are located.
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The Large Intestine
The two ceca pouches further contribute to aiding in fiber digestion and absorption.
Ceca PouchCeca Pouch
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