What are the structural features of the stomach in ruminant artiodactyls?

Artiodactyls are divided into non-ruminants (pigs) and ruminants (cows, goats). In ruminants, the stomach consists of 4 chambers: a) the scar – here food accumulates, cellulose begins to ferment and break down with the help of microorganisms, from here it burps in portions into the mouth, where it is thoroughly chewed; b) mesh – only well-chewed food passes through it; c) a book – here the crushed food is processed with juices, carbohydrates are broken down, water is absorbed; d) proteins begin to be digested in the abomasum.

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