Question

what is rumen in very very short answer​

Answer 1

Answer:

stomach of the cow, the rumen, is a fermentation chamber in which bacteria digest the cellulose in grasses and feeds, converting them to fatty acids and amino acids, which are the fundamental nutrients used by the cow and the basis for the cow's production of milk.

Answer 2

Answer:

the first stomach of a ruminant, which receives food or cud from the oesophagus, partly digests it with the aid of bacteria, and passes it to the reticulum.

Explanation:

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