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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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