Omasum

( Called lat omasum, also Book ( stomach ), psaltery, calendars, or solver ) The omasum is a division of the fore-stomachs of ruminants. He is a balloon- like structure on the right side in front of the abdominal cavity and is adjacent to the liver, reticulum and abomasum. In cattle, it is about the size of a medicine ball. It owes its name to the formed inside about 100 mucosal folds ( laminae omasi ), which appear as leaves of a book.

Function

The fermented in the rumen, food passes through the reticulum and reticulo - omasicum the ostium into the omasum. The Psalterblätter wear short, horny papillae ( papillae omasi ). In the narrow spaces between the Psalterblättern ( recess interlaminar ) is the intrinsic motor function of the omasum ( Psalterkontraktionen ) squeezed liquid from the mash and thickened it. In addition, omasum water and water-soluble nutrients are absorbed, making this part of the stomach has a relatively firm consistency. The now more thickened food passes through the contractions of the omasum via the ostium omasoabomasicum in the actual glandular stomach of ruminants, the abomasum.

Diseases

On occasion, excessive thickening and impaired motor skills to a blockage of the omasum. Also a silting with heavily contaminated feed is possible. Both draws heavy indigestion after themselves, which end without treatment deadly by the veterinarian.