- Abomasum
The abomasum, also known as the maw [http://www.chambersharrap.co.uk/chambers/index.shtml The Chambers Dictionary, Ninth Edition, Chambers Harrap Publishers, 2003] ] , and the rennet-bag, is the fourth and final
stomach compartment inruminants . The normal anatomical location is along ventral midline. It is a secretory stomach similar inanatomy and function as themonogastric stomach. It serves primarily in theacid hydrolysis of microbial and dietaryprotein , preparing these protein sources for furtherdigestion and absorption in thesmall intestine .Dairy cattle on high production diets are susceptible to a number of pathologies, most commonly after calving. A gas filled abomasum can move into an abnormal location resulting in left displaced abomasum (LDA) or right displaced abomasum (RDA). If the abomasum displaces to the right, it is at risk of torsion and becoming a right torsioned abomasum (RTA). A displaced abomasum will cause cows to present all or some of the following signs: loss of appetite, decrease rumen contractions, decrease cud chewing, and drop in milk production. While an LDA and RDA are not immediately life threatening, veterinary care is required for surgical correction.
It secretes
rennet , an ingredient used in cheese creation.The word abomasum is from
New Latin and it was first used in English in 1706. It comes fromLatin "ab-" + "omasum " "intestine of an ox," and it is possibly from theGaulish language .References
Wikimedia Foundation. 2010.