Spiders Focus

Spiders and their relatives are not exactly the best reputation. Many people are not happy and will probably never even been in humans too in popularity. We can probably be attributed to their many legs, chlupatemu body, or ideologically motivated rather suggestive way mating rape, after which the male is killed.

Throughout the world, is about 39 000 known species of spiders, which is divided into suborders, in Central Europe, however, the number rarely exceeds a thousand. Some people believe that spiders are among insects. The difference between the two groups, however, now know, at first sight, according to the number of legs. While insects have six legs substantially (Class Hexapoda, in translation sestinozi), spiders moving after eight legs and belong to class pavoukovcu (Arachnida). The two classes also have different body shape. Unlike trojdilneho breakdown in the body of insects spiders only two parts: hlavohrud and the stalk attached tail. On hlavohrud nasedaji four pairs of limbs. The first pair of limbs are transformed into claws, the second in makadla.Another feature spiders are simple eyes (insects have compound eyes). Spiders usually have eight of them - the eye is located hlavohrudi node with eight little, symmetrically rozlozenyma eyes. It is their relatively limited field of vision.

Spiders eat all animals smaller than themselves. Prey catching either cobwebs, especially touch, or it goes the speed of lightning. Important role to the sensory hairs, especially on a makadlech front legs. Zapasici spoil you hold a few feet and Zabori to her claws, vystrikne prey enzymes in the body, which through chelicer is mixed with tissues from animals to dissolve. Spiders are very delicate digestive tract, may eat only in liquid form. Prey by a spider nesezere immediately,Wrap the cobwebs.

Toxic gland is associated with priustnimi tongs and serve to paralysis or killing prey. About one tenth of the spider is able to prokousnout and human skin, but do so rarely. Some species, such as snovacky are even more hazardous to vertebrates, and a hundred species and poses a direct threat to humans. In our geographical area, however, none explicitly dangerous type nevyskytuje.Na feet have two drapky that can draw a number of species is at the end of whiskery foot pad, which allows them to climb even after skle.K pavoukum chisel or not, even though they look like.Not snovi network nor toxic glands as most of real spiders.

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