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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

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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 stomachfound in humans, swine, dogs, and cats.

Monogastric

What animals have a monogastric system?

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Pigs, dogs, cats and humans have a monogastric digestive system

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Ruminant or polygastric

One large stomach divided into four compartmentsfound in cattle, sheep, and goats.

An animal with this kind of digestive system is called a ruminant

Digestive systems

The rumen is the largest section of the stomach 60% of the stomach.Contains bacteria and other microbes

that promote fermentationFood 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

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

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?

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Rumen, Reticulum, Omasum, and Abomasum

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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

Pseudo Ruminant

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

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Pseudo ruminants can consume large amounts of forages because their enlarged cecum.

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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.

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

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