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(vertebrate zoology)
The final chamber of the complex stomach of ruminants; has a glandular wall and corresponds to a true stomach.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the fourth and last part of the multicompartmental stomach of ruminants, corresponding to the simple uncompartmental stomach of most mammals. The abomasum is connected to the omasum (third stomach) and the duodenum. The mucous membrane of the abomasum is covered by prismatic epithelium and contains fundic, pyloric, and cardiac glands. It forms 13 or 14 long folds, which enlarge its surface. In young animals the mucous membrane of the abomasum produces rennin. The muscular membrane of the abomasum consists of external longitudinal and internal circular layers. Food is digested in the abomasum by gastric juice.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Increased heart and pulse rate in animals suffering from intestinal obstruction and abomasal impaction followed by ruminal affection had been recorded in present study.
Las imagenes inferiores muestran: contenido abomasal con numerosos nematodos rojos (flechas) de unos 3 cm de longitud (d); huevos de trichostrongilidos en heces (e), y parte inferior de la cola de un macho adulto de Haemonchus senalando (flecha) las espiculas distintivas del parasito.
Elimination of abomasal parasites was achieved with the oral dose of 1 ml/5 kg bodyweight of the Ex/Ox combination, including a large burden of Ostertagia-type parasites with three different species represented.
Aaron, Nitrogen Metabolism and Somatotropin Secretion in Lambs Receiving Arginine and Ornithine Via Abomasal Infusion, J.
Epidemiology of abomasal nematodes of sheep in Sweden with particular reference to over- winter survival strategies.
Management implications of abomasal parasites in southeastern white-tailed deer.
[29.] Umair, S, Bland, RJ and Simpson, HV, "Glutamate synthase, but not GABA shunt enzymes, contributes to nitrogen metabolism of the sheep abomasal nematode parasites Haemonchus contortus and Teladorsagia circumcincta", Experimental Parasitology 2011; 127: 9-13.
A ulcera abomasal primaria e observada em vacas leiteiras de alta producao, touros adultos e em bezerros, nos quais a causa ainda nao e bem definida.
It has expanded and new conditions like congenital vertebral malformation, erythropoietic porphyria, incarcerated umbilical hernia, bleeding calf syndrome, besnoitiosis, tail sequestrum, rib fracture, abomasal impaction, tuberculosis, cardiac tamponade from tire wire, digital dermatitis, crushed tail head, BVD/MD retinopathy, botulism, fatty liver syndrome, persistent preputial frenulum, ischemic teat necrosis, and jejunal hemorrhagic syndrome.
[12] Holtenius, K, Sternbauer, K and Holtenius, P 2000: The effect of plasma glucose level on abomasal function in dairy cows.
(2007) indican que el efecto negativo de los aceites marinos, aunque diferente en grado, es independiente de la via de administracion (ruminal o abomasal) y forma de presentacion (libre, sales calcicas, encapsulado), lo que sugiere que ejercen su efecto tanto a nivel ruminal como metabolico.