How is the stomach of a cow different from the stomach of a man?

A cow has a four-chambered stomach that digests plant matter more efficiently than a human's. Cows are called ruminantsbecause they are able to regurgitate partly digested material and rechew it again. A human, on the other hand, has a simple stomach, and is a part of the single-stomached group called monogastrics, which all have one simple stomach designed to digest protein and carbohydrates, not fibrous plant material.