explain the process of digestion in grass eating animals?
Cows, buffaloes and other grass-eating animals chew continuously even when they are not eating grass. This is because they quickly swallow the grass and store it in a separate part of the stomach called rumen. Here the food gets partially digested and is called cud. But later the cud returns to the mouth in small lumps and the animal chews it. This process is called rumination and these animals are called ruminants. The grass is rich in cellulose, a type of carbohydrate, which the other animals, including humans, cannot digest it.
But the ruminants have a large sac-like structure between the small intestine and large intestine, and the cellulose of the food is digested here by the action of certain bacteria which are not present in humans.