Why do rats often gnaw

Rats are large numbers of rodents. In the world, according to analysis, rats have 35 families and each family has more than 350 different species. Rats are mostly harmful to humans. Rats that live close to humans often cause people a lot of trouble, damage crops, damage food.

On average, a mouse is about 7.5 cm long and weighs about 10g. Their fur is usually light brown, gray and white. When running, the mouse stride is up to 4.5 cm long, jumping up to 45 cm high. When growing up, female rats will have 5 pairs of breasts and male mice do not have but only two testicles located behind the genitals.

Giải thích: Vì sao chuột thường xuyên gặm nhấm?

Among the animals that harm humans, the mouse is the biggest culprit. Not only cupboards, clothes, food… but also buildings were damaged by them. Did they digest everything they bitten into?

In fact, they don’t like to eat hard things. If you look closely around the place where the chest, cabinet or other item has been damaged by a mouse, you will see that there is always a small pile of crumbs next to it. Turns out, they do it just to ease the discomfort of their front teeth.

The incisors of animals in general only grow until a certain point and then stop, but not in mice. The two incisors in its upper and lower jaws are continuously erupting, possibly a few millimeters a week.

You might think, if the front teeth keep growing, won’t the mouse’s mouth be closed? In fact, this situation never happened, because to overcome the situation, rats resorted to gnawing on hard objects to reduce the length of their teeth. So rodents are actually a type of their biological adaptation.

Why do rat’s front teeth grow longer? The main substance to form teeth is solid tooth substance, in the lumen of each tooth there is also a hollow cavity, called the pulp cavity. When animals are still young, the root of the pulpal cavity is open to allow blood and nerves to enter, providing nutrition for the tooth cells in the pulp cavity. In general, other animals after the adult tooth, the root of the pulp cavity is sealed, the tooth cytoplasm does not receive nutrients, and then stops growing. As for rats and rabbits, the pulp cavity is not sealed, so their incisors grow for life.

 

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