Veterinary Splanchnology and Applied Anotomy

Exterior of ruminant stomach

EXTERIOR OF RUMINANT STOMACH ( OX )

Ox

• The stomach of the ox is very large and occupies nearly three-fourth of the abdominal cavity
• It completely fills up the left of the abdomen except for a space intended for the spleen and extends considerably into the right half
• It has four compartments,
  • Rumen (paunch)
  • Reticulum (honeycomb)
  • Omasum -(many folds, many plies or psalterium) and
  • Abomasum, (rennet or true stomach). The division is indicated by grooves

Capacity

• Varies according to the age, size, breed, etc. Medium size is 30 or 40 gallons

• In the new born the first and second are about half of the fourth. At 10 to 12 weeks the ratio is reversed
• At four months rumen and reticulum are 4 times as large as other two compartments
• At 1 1/2 years omasum equals abomasum, rumen 80%, reticulum 5%, Omasum 7 to 8%, abomasum 8 or 7% (In adult)