A rumen.
Ruminants such as cattle have four compartments to their stomachs. Moving oral to aboral, they are the rumen, the reticulum, the omasum and the abomasum.
The rumen is a 'pouch' where the cud is stored in ruminant animals such as cattle, goats, giraffe, sheep, and deer. The cud is then returned to the mouth and is re-chewed.
The Omasum is the third chamber of the ruminant stomach. It contains many folds so which enables water to be absorbed from the digesta that came from the rumen. The omasum is typically located between the rumen and the abomasum.
Microorganisms in the rumen (the cow's first stomach) can turn urea into protein - this increases the growth rate.
Rumen stasis is a condition in cattle where the normal contractions of the rumen slow down or stop, leading to decreased feed intake, decreased motility within the digestive tract, and potential accumulation of gas and toxins. It can be caused by factors like stress, sudden diet changes, or bacterial infections, and may require veterinary treatment to prevent further complications.
A rumen fistula is a surgically created entry to the rumen in the left flank of the ruminant, typically permanent and with a rubber or similar material device (a 'cannula') fitted to close it between times of use. It enables the rumen contents to be accessed, and the rumen wall to be viewed and biopsied. Surgically modified ruminants such as these are only found on research farms, where they are used to study rumen function. Looking in through the fistula, you can see the rumen contents and the rumen wall.
Rumen Denev has written: 'Posledno'
Animals with more than one compartment to their stomach (i.e. Goats and Sheep or cattle or llamas) have a compartment called the rumen in which all food enters first. The rumen is full of gases and bacteria that assist the animal with breaking down the grass and other feed. The animal grazes or eats its feed, and it enters the rumen, and later, usually when resting, the animal regurgitates chunks of the food from the rumen (called boluses) and chews on them, breaking then down further. The next time the animal swallows the bolus, it enters a different compartment of the stomach, and continues with regular digestion.
Lawrence Giles Jayko has written: 'A study of starch digesting organisms in the bovine rumen' -- subject(s): Bacteriology, Digestive organs, Microbiology, Cattle
Rumen Danov has written: 'Zhiva stomana'
Rumen Petrov has written: 'Neshto nepreodolimo'