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rumen
ru·men R0344000 (ro͞o′mən)n. pl. ru·mi·na (-mə-nə) or ru·mens The first division of the stomach of a ruminant animal, in which most food collects immediately after being swallowed and from which it is later returned to the mouth as cud for thorough chewing. Also called paunch.
[Latin rūmen; akin to Sanskrit romantha-, ruminant, chewing the cud.]
ru′mi·nal adj.rumen (ˈruːmɛn) n, pl -mens or -mina (-mɪnə) (Zoology) the first compartment of the stomach of ruminants, behind the reticulum, in which food is partly digested before being regurgitated as cud[C18: from Latin: throat, gullet]ru•men (ˈru mɪn)
n., pl. -mi•na (-mə nə) 1. the first stomach of a ruminant, in which food is softened and then regurgitated for cud-chewing. 2. the cud of a ruminant. [1720–30; < Latin rūmen] ru·men (ro͞o′mən) The first and largest division of the stomach in ruminant animals, in which the food is fermented by microorganisms. See more at ruminant.Thesaurus| Noun | 1. | rumen - the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewingfirst stomachruminant - any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartmentsstomach, tum, tummy, breadbasket - an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion |
Translations
Rumen
rumen[′rü·mən] (vertebrate zoology) The first chamber of the ruminant stomach. Also known as paunch. Rumen (also paunch), the first and largest section of the four-chambered stomach of ruminants. The rumen occupies almost the entire left half of the abdominal cavity. In adult animals its volume equals four-fifths the volume of the entire stomach. In newborns, which are fed only milk, the rumen is half the size of the abomasum. The first section of the rumen is connected to the reticulum and the esophagus. The rumen’s walls consist of the serous membrane (exterior membrane), the muscular membrane (middle membrane), and the mucous membrane (interior membrane). The interior wall has bands that divide the rumen into sacs, which slow down the movement of food. The interior epithelial surface, except for the bands, has processes, or papillae. In camels and llamas the walls of the rumen have deep cells, in the floors of which open cardiac glands. Such glands are absent in the rumens of other ruminants. Decomposition of plant substances through bacterial and protozoan activity occurs in the rumen. Volatile acids are assimilated through the surface of the mucous membrane. The food is subjected to the action of enzymes and is mixed. From the rumen the food enters the reticulum or is regurgitated into the mouth, where it is masticated again. The food then passes into the omasum through the esophageal groove. T. B. SABLINA [22–10101] rumen
rumen (rū'men), The anaerobic fermentative fore stomach of ruminants that consists of anatomically and functionally indistinct chambers; important role in the predigestion of the cellulose rich diet of herbivores. In addition to the specialized anatomic pouches, a rich biodiverse population of protists, viruses, fungi, bacteria, and enzymatic cofactors mix with water and alkaline saliva (during rumination) serves as a microenvironment within which volatile fatty acid (VFA) end-products (e.g., butyric acid, valeric acid) are generated (along with by-products such as belched or eructated methane and fine textured ingesta that passes to the rear gut to complete digestion and form feces). Average rumen holds 40 gal or 160 L of ingesta. Compartments include the reticulum and rumen (proper); rumen is compartmentalized by anterior and posterior pillars. Ventral and dorsal coronary pillars divide off the ventral and dorsal blind sacs, and by longitudinal pillars, which divide the main rumen compartment into the dorsal and ventral sacs, as well as the omasum and abomasum (the latter is the true monogastric type stomach).
See also: ruminant. [L. throat, gullet] rumen (ro͞o′mən)n. pl. ru·mina (-mə-nə) or ru·mens The first division of the stomach of a ruminant animal, in which most food collects immediately after being swallowed and from which it is later returned to the mouth as cud for thorough chewing. Also called paunch.
ru′mi·nal adj.rumen a branch of the oesophagus of ruminants in which unchewed food is stored temporarily and from which it is regurgitated to the mouth for chewing (see RUMINANT STOMACH). Some cellulose is digested and absorbed in the rumen and bacterial action results in the synthesis of B vitamins there. Cellulase is produced by bacteria which may number 1 billion per cm3 in the rumen.rumen
Synonyms for rumennoun the first compartment of the stomach of a ruminantSynonymsRelated Words- ruminant
- stomach
- tum
- tummy
- breadbasket
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