Final answer:
In the bovine, ingesta freely moves back and forth between the rumen and the abomasum. These two chambers in the digestive system of ruminants allow for the efficient breakdown of cellulose and the absorption of nutrients.
Step-by-step explanation:
The correct answer is b) Abomasum.
In the bovine (cattle), the ingesta freely moves back and forth between the rumen and the abomasum. The rumen is the first stomach, where microbial fermentation of plant material occurs. The abomasum is the true stomach, where digestive enzymes are secreted. These two chambers in the digestive system of ruminants allow for the efficient breakdown of cellulose and the absorption of nutrients.
The ruminant stomach has four compartments: the rumen, reticulum, omasum, and abomasum. In this multi-chambered system, microbes play an essential role in breaking down plant material that animals such as cows and goats consume. This complex process facilitates efficient digestion and nutrient absorption in these herbivores.