Why spider does not stick to the web?
To see the spider, it is not necessary to go far: these arthropods are found everywhere: in the forest, and in the house. But not everyone knows that spiders – representatives of the family who worried flourishing in Paleozoe, to dinosaurs. Survive to them helped the most important evolutionary acquisition – Web. It is with its help that they build asylum and cocoons for carrying eggs, catching prey.
One of the most advanced builders – Spider of the family of circle. The circup range consists of two varieties;. The first is thick and durable – tensioned radially. They are deprived of the sticky secret and perform a reference function – it is on them that the owner of the web is moving. So that he can deftly run through the radial threads, his legs are equipped with hooked cohesives and strong curved bristles. The thread is clamped between the claw and bristles, securely holding its owner.
Other threads are thin, lungs and very sticky, they are located on a radial carcass on the spiral. On them, the spider almost never crawls, but sometimes he still has to turn them, wasting and even eat them. But it also does not stick to these threads! Why? The fact is that the spider contacts them on a very small area – bristles on the tops of the legs, which are also covered with a special substance, and the web is not glued to it.
Spiders, Walking Networks for Fishing, Many: Cross, Baldhainnik, Teanelik and DR. But there are those who do not build networks. They use a web for the construction of shelters, linse her walls of minks, make signal threads, weave cocoons for carrying eggs and t. D. They have a web not sticky, and a relationship has not registered a relationship.