The stomach of cattle consists of four gastric cavities, namely rumen, reticulum, bicuspid stomach and abomasum. The main function of rumen is to store feed and microbial fermentation, which can help degrade fiber and promote digestion.

The main function of "net stomach" is like a sieve. When cattle eat grass, it is inevitable that they will eat wire and nails. The reticular stomach mainly plays a filtering role.