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From Latin serra, the concept of saw It has various uses. It is, on the one hand, the tool used to cut hard objects such as wood . This device usually has a serrated steel blade that is attached to a handle or handle.

The saw can be manual (driven and operated with the action of the hands) or connected to a power source. Energy (electricity , steam or other). As for the teeth, there are three main types: universal teeth (with pointed teeth that have a positive or negative angle and are inserted), the North American teeth (which alternates three straight teeth with one concave) and the Japanese jagged (combines teeth of different sizes, with an emptying of the outer faces of the blade).

For example: “I will go to the forest to look for firewood: please, reach me for the mountains”, “I need a saw to cut the branches of the tree that already enter the house”, “A neighbor of my grandmother cut her hand with a saw”.

We cannot ignore what is known as a chainsaw, which is that saw that is made up of a series of teeth that are put into operation when driven by a motor. It is curious to underline that one of the most important horror characters of the twentieth century, the protagonist of the film series "The Texas Chainsaw Massacre", uses that tool to kill his victims.

However, we cannot forget that the saw is an instrument of torture that is already included in the Bible. In Spain, it was used during the eighteenth century as a way to end the life of the military who, for one reason or another, had not exercised their own functions.

However, in the rest of Europe the saw was also used as a mechanism of torture and death. Thus, for example, in France it was used to end the witches and in Germany the same was done with those peasants who were considered to incite the rest of the people to rebel against the rules and obligations imposed.

A saw, on the other hand, is a part of a mountain range . It is usually composed of a main mountainous alignment that acts as your axis and that, in certain cases, it is accompanied by other mountains of lower altitude: “Sierra Maestra is a key place in the history of Cuba”, “I will visit the mountains of Tandil on my next vacation”.

In the case of Spain, one of the most important mountain ranges is the so-called Sierra Morena, located in the south of the country. It is about 400 kilometers long along which there are natural spaces of great value and natural interest such as the Sierra de Cardeña-Montoro Natural Park or the Despeñaperros Natural Park. Both are known to be the habitats where they are living one of the animal species that are in danger of extinction: the Iberian lynx.

The sierra, also known as barracuda , is a long thin fish That lives in the southern hemisphere. Inhabits the seas, has a dorsal fin and can weigh up to six kilograms.

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