It is present in cattle, buffaloes, deer, goats, camels and sheeps. The stomach of ruminant is a compound structure having following four chambers :

1. Rumen -  It is the largest chamber which receives oesophagus

2. Reticulum - The rumen leads into reticulum. The reticulum has network of ridges which give it an appearance of honey comb.

3. Omasum - The omasum is a small chamber whose longitudinal folds in omasum bring mechanical breakdown of the food.

4. Abomasum.- The abomasum is the only part which has gastric glands.