Water on the Web - Nature's Jewelry
The thread that spiders produce come from glands called spinnerets. There are, so far, seven different types of spinnerets that have been identified and each one has a separate purpose. Each type of spider will possess a few of these spinneret glands, but there has never been a recorded case of a spider having all seven types!
There are sheet webs, like this one - with the spooky “black” hole at the center! -
Then, there are funnel and tubular webs
Sometimes, many spiders will build webs together.
clipped from: www.darkroastedblend.com 
