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Anus in digestion of pig

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This content is taken from our book, Managing Pig Health, the industry leading pig publication. Available now from 5mBooks. The digestive tract can be considered as a tube that starts at the mouth and finishes at the rectum Fig. In some respect its contents can be considered as outside the body. The back of the mouth opens into the pharynx which is the common area for the passage of both food and air.
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Digestive System of the Pig: Anatomy and Function

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PigProgress - Pig nutrition: More than just food

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15.1 Digestive Systems

Animals obtain their nutrition from the consumption of other organisms. Depending on their diet, animals can be classified into the following categories: plant eaters herbivores , meat eaters carnivores , and those that eat both plants and animals omnivores. The nutrients and macromolecules present in food are not immediately accessible to the cells. There are a number of processes that modify food within the animal body in order to make the nutrients and organic molecules accessible for cellular function.
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The digestive system of a pig is well suited for complete concentrate based rations that are typically fed. The entire digestive tract is relatively simple in terms of the organs involved, which are connected in a continuous musculo-membanous tube from mouth to anus. Yet this multi-faceted system involves many complex interactive functions. The goal of this paper is to describe the organs involved in digestive and biological functions Figure 1. The mouth serves a valuable role not only for the consumption of food but it also provides for the initial partial size reduction though grinding.
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