Quality Silk
Spiders are known for the production of silk,
with which they construct spiderwebs. With
the threads made in their glands, spiders can
capture prey, defend themselves, or care for their
offspring. Seven types of silk-secreting glands
are known, but no spider has all seven types
at one time. Inside the gland, the silk that
spiders produce is liquid, though it
emerges as a solid fiber.