At spiders are not insects, are invertebrate animals belonging to the Phylum Artropoda. Currently, around 30,000 species of spiders are known, which can be found in many environments on the planet, including desert regions.
At spiders, depending on the species, vary in size, shape and behavior, but have some characteristics that are common to all species.
Photo of an armored spider. All spiders have eight legs, chelicera, pedipalps and spinners
All spiders have:
® Four pairs of legs;
® A pair of pedipalps;
® Chelicerae;
® Spinners.
At spiders do not have antennas.
the body of spiders It is divided into cephalothorax and abdomen. It is called a cephalothorax because the head is fused to the animal's chest.
You pedipalps they are found in the spider's cephalothorax and perform several functions: they manipulate food and act as taste organs, that is, organs that sense the flavors of food.
At chelicerae they are sharp structures that serve to inject venom into prey and capture food. These structures are also found in the animal's cephalothorax.
At spinners are found in the animal's abdomen and have as its main function the production of silk to make its webs.
The spider's body divides into cephalothorax and abdomen
the webs of spiders are used for various purposes, such as: form the cocoon (where the animal will lay its eggs), store food and capture prey.
There are some spiders they have powerful poisons and their stings can cause some problems for humans. Among them we can mention:
® Spider gun;
® Brown spider;
® Tarantula;
® Black Widow.
THE tarantula, although large and frightening in appearance, it is not responsible for serious accidents in humans.
The crab, despite being large, is harmless
Paula Louredo
Graduated in Biology
