When i was little children I used to spend most of my time during summer vacation on the tree. There were many grass-eating animals like cow, goat, and sheep used to relax in the shade of trees. I often used to see that they used to chew something constantly when they were not eating anything. This was a mystery for me. But I understood it completely when i was on seven standard. And I want to explain you. why all the grass-eating animals use to chew constantly even when they are not eating something.

So, Let's begin !

The grass eating animals like the cow, goats, sheep and deer swallows the grass quickly with little chewing. After few hours. They bring the food from the stomach back into the mouth and again chew it. This process is called rumination. And such animals are called ruminants.

Now, the question is

Why is ruminations necessary for grass eating animals

Answer:  We well know that grass eating animals use to eat grasses. And the grass is rich in cellulose (The cellulose is a type of carbohydrate). Many animals including human cannot digest cellulose. But grass is the main food for grass-eating animals. Hence they need to digest the grass. For digestion of grass they take part in a process called rumination. Without rumination they cannot digest the grass taken as food. That's why ruminations is necessary for grass eating animals.

Now, Let's know

What is actually occurring on the process of rumination

Grass eating animals eat grasses during grazing and quickly swallow it. After swallowing the grass it goes into a separate compartment of the stomach which called the Rumen. There are some bacteria in the rumen that can digest cellulose present on the grass. Here food get partially digested. This partially digested food is called cud. After sometime  this cud again return to the mouth in small lumps and then animals chew it thoroughly. This is the reason that many times I were used to see a cow or goat moving their jaws from side to side and chewing continuously even when it is not eating grass.

LAST WORD

Rumination is a process which occurs only in grass eating animals.