Which description correctly defines ruminant digestion?

• A. One stomach
• B. Multiple compartments/1 true stomach
• C. Four stomachs
• D. No stomach

Answer: (B)

Ruminant digestion is defined by a stomach that is divided into multiple compartments, not a single sac. The rumen and reticulum host microbial fermentation of fibrous plant material, producing volatile fatty acids that serve as a major energy source. Chewing cud increases surface area and time for this fermentation. The omasum concentrates and transfers digesta to the abomasum, which is the true stomach where acid and digestive enzymes break down proteins. This combination of foregut fermentation with a distinct true stomach is what makes the description of multiple compartments with one true stomach the most accurate representation.