Cobweb The thread fibers - multifunctional , long and thin thread [1 ] , the fiber produced as a result of solidification in air fibers gland secretions of some arthropods , composed of fibroin fibers bonded serycyną . The thread of spider fibers is called a spider thread , and created a network of the hunted - cobwebs . Commonly [ 2] [ 3] [ 4] These names are used as identical, both in terms of the same thread as the fibers ( silk thread , the thread spider , spider web thread ) and made therefrom structures (networks hunted , floss , floss , and other ) .Threads fibers are formed by solidification of the air discharge spider spinnerets zaleszczotków fibers or glands , przędziorkowatych , some wijów and caddis larvae and butterflies [ 2]. Silk glands are widely distributed and are connected to specialized groups that produce secretions with a different composition for each group . Most of them formed thin threads of yarn clumping together in the telling . Other produce mucus viscosity maid broadcasting already solidified niciom or to build shelters or egg cocoons . In spiders , the use of glands fibers and the way in which networks are constructed catching the characteristics of individual families.Spider silk is flexible , insoluble in water, is several times thinner than a human hair and has very good mechanical properties [ 5]. It can increase its length by 40 % without tearing up . It is characterized by high mechanical strength , the highest among the natural fibers. Threads fibers, most spiders are characterized by double strength , and caddisflies 1.5 times higher than the strength of steel with the same cross section .Animals that produce strand fibers use them to build their nests , floss , floss , network game, air tanks , threads insurance and locomotion ( Indian summer ) .A common example of the use of thread fibers acting as a spider web game many spiders. This is a mechanical trap with interwoven strands forming a network , often with intricate design and carefully selected filter holes prey . [7]Particular groups of fibers glands produce different types of threads. To build a network game uses structural and elastic thread sticky thread, whose job it is shackling the body of any victim . [8] Another group of glands producing thread for building floss , floss or egg cocoons . In cockroaches and mantises similar function fully ooteka . An example of a species of spider thread using air tanks to build a spider a topic ( Argyroneta Aquatica ) .The Lake Tawakoni State Park , Texas, in 2007, was recorded for the first time a huge spider web with a length of 180 m entomologists believe that the network is a collaboration of the family omatnikowatych spiders ( Theridiidae ) . Entomologist at the University of Texas, John Jackman confirms that such cobwebs occur every few years. To date, no known exact cause of this behavior of spiders.
Posted on: Tue, 01 Oct 2013 09:17:28 +0000
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