the way the spider maintain yourself from the enemies

Defense systems spider a pair of fangs of her teeth
Not all spiders make webs to catch prey, but all capable of producing silk thread, namely the strands of protein fiber that is thin but strong of nodes (called a spinneret) located at the rear of the body. Silk fibers is very useful to assist the movement of the spider, swinging from one place to another, ensnare prey, making an egg sac, protect the hole of the nest, and others