What is the smallest chamber of the stomach of ruminants?

The smallest chamber of the stomach of ruminants is the abomasum. It is often referred to as the "true stomach" and is similar in function to the stomach of non-ruminants, where enzymatic digestion occurs. The abomasum follows the rumen, reticulum, and omasum in the digestive sequence. This chamber plays a crucial role in breaking down feed and absorbing nutrients.