ANATOMY

Detailed explanation-1: -The omasum is the third chamber in the ruminant stomach. It lies within the intrathoracic part of the abdomen so cannot be palpated manually. Instead it is examined by ausculation. The omasum has biphasic contractions which squeeze fluid out of the food before allowing the ingesta to continue into the abomasum .

Detailed explanation-2: -The omasum is a globe-shaped structure containing leaves of tissue (like pages in a book). It absorbs water and other substances from digestive contents. Feed material (ingesta) between the leaves will be drier than ingesta found in the other compartments.

Detailed explanation-3: -The rumen contracts, forcing some of this well-chewed food into the second stomach, or reticulum. From there it passes to the omasum (third stomach), where water is extracted. It then enters the true, or fourth, stomach, the abomasum, where gastric juices (containing hydrochloric acid) are added to the food.

Detailed explanation-4: -The omasum, also known as the bible, the fardel, the manyplies and the psalterium, is the third compartment of the stomach in ruminants. The omasum comes after the rumen and reticulum and before the abomasum.

Detailed explanation-5: -The third compartment of the ruminant stomach is the omasum. The internal wall is in the form of deep, thin folds like the pages of a book. This appearance accounts for the popular name for the omasum, which is ‘bible.