NACA Animal Control Officers Test 2026 – 400 Free Practice Questions to Pass the Exam

Ruminants are defined by their specialized digestive system, which consists of an elaborate, multi-compartment stomach. This stomach is comprised of four distinct chambers: the rumen, reticulum, omasum, and abomasum. This unique structure allows ruminants to efficiently break down fibrous plant materials through a process known as rumination, where they regurgitate and re-chew their food to aid digestion.

The multi-compartment stomach enables these animals to extract nutrients from tough plant materials, such as grasses, which are difficult to digest. The fermentation process in the rumen, facilitated by a diverse community of microorganisms, helps break down cellulose and other complex carbohydrates. This classification includes animals such as cows, sheep, and goats, which rely heavily on plant-based diets.

In contrast, the other types referenced in the options do not accurately describe ruminants. Animals with a simple stomach, primarily carnivores, and those that ferment food only in the colon do not exhibit the same digestive adaptations as ruminants.