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Cellulose
cellulose which is present in grass can be digested by ruminants but cannot be digested by humans
Ruminants have green plants as their food. These plants contain a type of complex carbohydrate, called cellulose. In the cecum, a kind of symbiotic bacteria helps digest cellulose. In ruminants, a major part of all carbohydrates, including the complex carbohydrates such as cellulose and hemi-cellulose, is digested by bacterial action.
cellulose
It is Cellulose
cellulose.
Humans can't digest cellulose.
Actually ruminants cannot digest cellulose, they have symbiotic bacteria in a part of their stomach called a "rumen" digest the cellulose down to sugars and starches that the ruminants can actually digest in another part of their stomach later.
swallowed and partially digested
Mostly it is the cellulose. It cannot be digested
The answer to that would most likely be cellulose or lignin. Cows can break this substance down, but not completely, and as such cannot be entirely digested in their stomachs.
Glycogen can be digested by humans. Chitin and Cellulose, also knows as fiber, can not be digested by humans.