Digestion
in Simple Stomach animals
Simple stomach animals or
monogastric animals from the word “mono” means they have single compartment.
Unlike ruminants, monogastric animals have less bacterial activity in their
stomach; there is no transformation of low quality proteins to high quality
proteins, they have less ability to manufacture vitamins and unable to digest
large volume of fiber. Proteins, vitamins and minerals content in daily ration
of these animals should give much more consideration. Deficiency of this will
cause stunted growth and very easy to catch any infectious diseases and
eventually death. Giving ration with high fiber is futile because it has a
little value for them, much better if this animal will consume high
concentrated feeds stuff.
Digestion
in Poultry
Poultry animals cannot be considered
as simple stomach though they have similar digestive system. This animals eats
minimal amount of fiber, in their digestive tract have less digestion and
microbial activity.
The
Digestive Organs
The poultry has a typical avian
digestive system. In chickens, the digestive tract also referred to as the
gastrointestinal tract or GI tract. The parts
of the digestive system are Crop, Proventriculus and Gizzard.
Crop. The crop is a pouch like in
the esophagus and is located just outside the body cavity in the neck region. The
food taken from the mouth will move down to the esophagus into crop. Swallowed
feed and water is stored in the crop, it serves as a reserve to hold and
moisten feed until they are passed to the rest of the digestive tract Although
the digestive enzymes secreted, very
little digestion takes place in the crop—it is simply a temporary storage
pouch
.
Proventriculus. The proventriculus
is a small organ and also known as the true stomach which receives food from
the crop. In this site digestion primarily begins and digestive juices are
secreted and mixed. Hydrochloric acid and digestive enzymes, such as pepsin,
are added to the feed here and begin to break it down more significantly than the
enzymes secreted by the salivary glands.
Gizzard or Ventriculus. The chief function
of gizzard is for grinding, mixing, and pulverizing food before it pass through
the small intestine for absorption of nutrients.
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