Answer:
Ruminent Stomach/digestive system is most commonly found in cattle, deers etc:
4 chambred stomach:
1- Rumen where plant material first gets processed
2- Reticulum, the animal regurgitates the material/cud
3-Omasum, the finely processed food passes through for further processing
4-Abomassum final chambe, true stomach where digestive enzyme breaks down the bacteria and releases nutrients.