1 the act of burning something; the burning of leaves was prohibited by a town ordinance. 2  a process in which a substance reacts with oxygen to give heat and light.  a state of violent disturbance and excitement; combustion grew until revolt was unavoidable.
It is not the cow that digests the feed but the bacteria in the rumen, which does the most of this work. The rumen contains billion bacteria and more specially, 1 mL of rumen fluid contains 10-50 billion microbes and over 1 million protozoa. These bacteria attach to the feed particles to digest the feed.UMEN (picture 1) : This is the first compartment of the cattleâs stomach and where fermentation occurs, which allows for the digestion of fiber and other feeds. This is the largest compartment of the stomach and can hold up to 50 gallons of digested feed.
As in hind-gut fermentation, microbes in the rumen produce sugars and short-chain fatty acids during the digestion of cellulose - these are the principal source of energy for the ruminant. However, the same microbes also synthesize vitamins, detoxify plant poisons, and recycle nitrogenous compounds into proteins - all actions which help the microbes survive.