Which statement about ruminant stomachs is true?

Which statement about ruminant stomachs is true?

• A. Ruminants have four compartments.
• B. Ruminants lack microbial fermentation.
• C. Ruminant stomachs have a single chamber.
• D. Ruminants rely solely on hindgut fermentation.

Answer: (A)

Ruminants digest primarily through foregut fermentation in a stomach with four compartments. The rumen and reticulum act as large fermentation vats where microbes break down fibrous plant material and produce volatile fatty acids that the animal uses for energy. The omasum helps remove water and further reduce particle size, and the abomasum functions as the true glandular stomach, secreting acid and enzymes to digest the microbial and dietary components. This setup means they do not rely on hindgut fermentation, and their stomach is not a single chamber. So the statement that ruminants have four compartments is accurate.

Ruminants digest primarily through foregut fermentation in a stomach with four compartments. The rumen and reticulum act as large fermentation vats where microbes break down fibrous plant material and produce volatile fatty acids that the animal uses for energy. The omasum helps remove water and further reduce particle size, and the abomasum functions as the true glandular stomach, secreting acid and enzymes to digest the microbial and dietary components. This setup means they do not rely on hindgut fermentation, and their stomach is not a single chamber. So the statement that ruminants have four compartments is accurate.