spiders

All spiders have silk glands, although not all use silk in spinning webs. When drawn and stretched from the spinnerets, located at the rear of the abdomen, the liquid silk solidifies into tiny strands that are both strong and elastic. It may require more than 80 grams of stress to break a thread of silk only .1mm in diameter. Spiders us silk for web-building, for capturing prey, for sperm transfer, for lining hibernating, molting or living chambers and constructing egg cases, for draglines and mating bowers, and spiderlings use silk for windborne travel.