The ancient ancestors of cows were absolutely defenseless,Because they could not run fast or fight back, because they did not have either fangs, claws, or developed musculoskeletal system. The ancestors of cows were apathetic, inactive and spent most of their life in a shelter. The only way to survive in this situation was the peculiar evolution of the gastrointestinal system of the animal.
The cow has a completely unusual stomach,Which consists of 5 departments: a scar, a net, a book, a rennet and an intestine. Such a stomach allowed and allows you to grab food, swallow and go so that predators do not have time to catch. And only then, in a safe place - the cows began to chew food.
Mechanism of digestion of a cow
Cow's vegetarian food todayFirst goes to the scar and undergoes a short fermentation process, and then it turns into a grid, rolls down into the grassy chewing gum and only from there returns to the mouth where it is chewed - for a long, unhurried time. This gives the impression that the cow is constantly chewing something.
The cow's cow is huge, it can hold up to 120 kilograms of food and store it for up to two days.
By the way, cows do not have upper teeth, andUpper gum completely firm. They do not chew, but grind food with it. At this stage of grinding, the main grinding of the grassy chewing gum takes place: the cow chews it for a long time, then swallows it, and the food goes to the "book", and then to the abomasum, where the process of its assimilation takes place. Unlike the scar, the "book" can only assimilate small particles of food, and its volume does not exceed 10 liters, so the animal always feels a slight feeling of hunger, again and again grabbing grass.
Such a system helps cows to get the most nutrients from the grass, which is the basis of their diet.
And what if you do not chew?
Those who keep the cow in the subsidiary farm,Know that chewing gum to animals is a good sign. A sick cow or one that is in a state of stress simply can not chew food, which means that such an animal will not give milk.
Refusal in the operation of the stomach of an animal may beCaused and swallowing an acute metallic object, for example, nails or metal shards. Such cases are very common and often lead to damage to the scar and cessation of the formation of the chewing gum. Without treatment, which is carried out mostly with tar, the animal is killed by hunger.