Why not confused spider in its web?

• Why does not the spider is confused in its web?

, Need not go far to see the spider: the arthropods are found everywhere: in the woods, and in the house. But not everyone knows that spiders - the genus, has flourished in the Paleozoic, before the dinosaurs. It helped them to survive the most important evolutionary acquisition - the web. With its help, they build shelters and cocoons for carrying eggs, catch prey.

One of the most advanced builders - Spider Web Spiders family. The network consists of orb weaving yarns in two varieties. The first - thick and strong - stretched radially. They are deprived of the sticky secretions and perform a supporting function - namely web host moves on him. So he can deftly run around the radial yarns, his feet are equipped with hooked claws and strong curved bristles. The thread is clamped between the claw and bristles firmly holding his master.

Other threads are thin, light and very sticky, they are located at a radial carcass in a spiral. According to him the spider crawls almost never, but sometimes he still has to pick them, and even wind up eating. But these strands it also does not stick! Why? The fact that the spider is in contact with them on a very small area - bristles at the tops of the feet, which are also coated with a special substance to it and the web does not stick.

Spiders spinning a network for the extraction of fishing, a lot: Araneus, baldahinnik, tenetnik, etc. But there are those who do not build networks.. They use the web to the construction of shelters, line the walls of her mink make the signal thread, weave cocoons for carrying eggs, and so on. D. They are not sticky web, and the question to them is irrelevant.