Cattle and dairy herds will be grazed on pasture with various grasses like timothy, bermuda and rye grass that typically contain 9-11% crude protein. Silage offers 15 - 20% crude protein. Alfalfa offers a higher level of protein than grass so is considered a high quality forage but can be high in calcium for cattle so is more common in dairy feed.
An herbivores strategy is to deal with the cellulose and lignin, found in plant cell walls separately from protein, fat, and carbohydrates. Cows have enlarged digestive tracts with fermentation chambers, called rumen, separate from enzyme digestion areas. The fermentation breaks down the cell walls and the enzyme digestion deals with the protein, fat, and carbohydrates from the plant cells and the fermentation bacteria.
The rumen contains bacteria capable of breaking down the cellulose cell walls to begin the process of releasing the nutrients inside. Some carbohydrates are converted to fatty acids and others are absorbed by bacteria and other micro-organisms. About seventy percent of the cellulose is eventually absorbed directly into the bloodstream from the rumen.
Once the food reaches the digestive stomach the enzymes break down the plant proteins and fats and, more importantly, they kill and absorb the billions of bacteria and other micro-organisms that have done all the work so far. In this way plant protein, transformed into animal protein within the herbivorous digestive tract, is available to the cow.
2007-12-19 10:46:06
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answer #1
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answered by gardengallivant 7
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Grass does contain a certain amount of protein but most is obtained from the cows digestive system.
In simple terms the cellulose in grass is digested by bacteria in the cows largest stomach ( the rumen). The bacteria are passed down into the intestine where the digestive process breaks the bacterial protein down into smaller fragments that are absorbed through the intestine. In the body these are recombined into the protein forming muscle/meat.
There is also some amino acid synthesis in the body from glucose.
2007-12-19 09:22:49
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answer #2
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answered by insomnia c 4
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Is this a serious question??!!
Cows are meat. You slaughter the cow and eat it, it's not like the meat is a by-product of the cow.
I guess you could say it eats the grass, which in turn gives the animal nourishment to grow and bulk up until we decide to eat it.
2007-12-19 09:08:32
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answer #3
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answered by pg 2
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cows make meat the same way you make muscle!! you have to kill the cow to get the meat...it's not like milk...
2007-12-19 09:12:31
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answer #4
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answered by Anonymous
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how do people turn pizza and cake into fat???
2007-12-19 09:34:14
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answer #5
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answered by j b 4
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