The stomach of cattle consists of four gastric chambers, namely, rumen, reticulum, retex and rumen. The main function of the "rumen" is to store feed and microbial fermentation, which can help degrade the ability of fibrous material and promote digestion.

The main function of the "mesh stomach" is like a sieve, when the cattle are eating grass, it is inevitable that they will eat wire, nails, etc. The mesh stomach mainly plays a filtering role.