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What is animal digestion? Look at the pictures below: How does this relate to agriculture?

What is Animal Digestion If you said: breaking down then you are correct The actual definition is: process of breaking down food into simple substances that can be absorbed by the body Another part of digestion is absorption: -process of taking the digested parts of food into the bloodstream

What is Animal Digestion? A. breaking down of food B. breaking down of liquid C. breaking down of air

Correct! Great job! The definition of animal digestion is: process of breaking down food into simple substances that can be absorbed by the body

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Digestive Systems The digestive system consists of the parts of the body involved in chewing and digesting food. Digested food moves through the animal’s body and absorbs the products of digestion

4 basic types monogastric (simple) ruminant (polygastric) pseudo-ruminant avian

Monogastric or simple contains a single-chambered stomach found in humans, swine, dogs, and cats.

Monogastric What animals have a monogastric system?

Correct! Great Job! Pigs, dogs, cats and humans have a monogastric digestive system

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Ruminant or polygastric One large stomach divided into four compartments found in cattle, sheep, and goats. An animal with this kind of digestive system is called a ruminant

The rumen is the largest section of the stomach Digestive systems The rumen is the largest section of the stomach 60% of the stomach. Contains bacteria and other microbes that promote fermentation Food is ingested, eructated (belched up), chewed, and then swallowed again

Digestive systems The reticulum Has honeycomb-like ridges Aids in keeping the food in the rumen mixed with water and saliva Until it is the right consistency Once the right consistency is reached, the mixture can pass on into the lower digestive tract

The omasum is a small compartment Main sight for water absorption Digestive systems The omasum is a small compartment Main sight for water absorption particles are squeezed and dehydrated, as well as sorted The compartment acts as a filter for the abomasum

The abomasum, or “true stomach,” is the site of digestion Digestive systems The abomasum, or “true stomach,” is the site of digestion Secretes gastric juices consisting of hydrochloric acid and pepsin The abomasum is similar to the stomach in a monogastric animal

Ruminant Digestive System What are the four chambers of a ruminant stomach?

Correct! Great Job!! Rumen, Reticulum, Omasum, and Abomasum

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Pseudo Ruminant A pseudo-ruminant can utilize large amounts of roughages because of its greatly enlarged cecum and large intestine Examples of pseudo-ruminants are horses, rabbits, guinea pigs, and hamsters.

Pseudo Ruminant Why can pseudo ruminant’s consume large amounts of forages?

Correct! Great Job! Pseudo ruminants can consume large amounts of forages because their enlarged cecum.

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The avian digestive system Found in poultry. Digestive systems The avian digestive system Found in poultry. Since a bird has no teeth, no chewing is involved The esophagus empties directly into the crop.

Digestive systems The crop is where the food is stored and soaked From the crop, the food makes its way to the gizzard The gizzard-very muscular organ-which normally contains stones or grit that grinds the food Digestion in the avian system is very rapid

Avian Digestive Name two important parts of the avian digestive system where the food is stored and where the food is broken down.

Correct! The crop stores the food and the gizzard breaks it down.

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