Classifications of Farm Animals Based on Types of Stomach
Farm animals can be classified into two groups, according to the type of stomachs or digestive system that they possess.
The first group is ruminants while the other group is non-ruminants.
Ruminants (Polygastrics)
These are animals that have complex stomachs and chew the cud e.g. cattle, sheep, goat, etc. They carry out regurgitation i.e. they act of bringing back already swallowed into the mouth for proper chewing.
They chew the cud (rumination) which means they bring back their food into their mouth from the rumen through anti-peristaltic movement for proper chewing. This happened when the animal is resting.
The complex stomach of a ruminant is made up of four cavities / chambers / compartments, namely;
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