The Rumen and Its Location (Why the Left Side of the Cow Is Important) In cattle, the rumen is the largest compartment of the stomach. It is mainly located on the left side of the abdomen, especially in an area called the left paralumbar fossa. 📍 Important Landmarks of the Left Paralumbar Fossa This region is bordered by: • Ribs in front • Lumbar vertebrae (backbone) above • Tuber coxae (point of hip) behind • Abdominal muscles on the side Between these structures is the paralumbar fossa, where

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