Web – one of the most surprising and beautiful creations created by spiders. For millions of years of existence on the earth these ancient inhabitants adapted to build strong and at the same time hardly noticeable lovchy network which is necessary for them for activity continuation.
Instruction
1. The thin thread of a web is allocated from the web glands located in a back part of a paunch of a spider. Scientists know seven types of the web glands making different types of a web, however one individual at the same time can have only from 1 to 4 types of glands.
2. Weaving of a web business labor-consuming. At first the spider extends hind legs the strong and long thread produced by special body. Then fixes it on any steady subject so that she reminded letter Y. In the nature, for example, spiders fix thread to branches of trees or bushes.
3. Then the spider builds a framework, connecting threads radiuses in the center of a frame. And only after that imposes a spiral from a sticky web which serves as the main trap for the stood gaping insects.
4. There are two types of a web: flat and volume. The first represents the most widespread type with the smallest amount of threads that does it hardly noticeable and not too elastic. The volume web differs in bigger complexity of threads thanks to what it turns out incredibly strong, but also at the same time very noticeable for insects.
5. The allocated web is used by a spider not only for creation of lovchy network, but also as a safety rope at jumps. In addition, spiders do of a web cocoons for eggs and build shelters for a wintering. And females, ready to pairing, produce the thread marked with pheromones on which the spider male with ease finds the partner.
6. The secret of durability and elasticity of a web at its improbable subtlety is in unique composition of thread. It contains a large amount of amino acids of alanine which form the crystal areas which are densely packed into folds. They provide to a web such durability. And the glycine which is a part does it elastic.