How do one celled organisms play a role in ruminants can?

One-celled organisms, such as bacteria and protozoa, are essential in the digestive process of ruminants like cows. They help break down cellulose in the rumen, a specialized stomach chamber, into simpler sugars that the ruminant can digest. This symbiotic relationship allows ruminants to extract nutrients from plant material that they would otherwise be unable to digest.