Spinneret

Spigots can be singular or found in groups, which also permits spiders to combine multiple filaments in different ways to produce many kinds of silk for various purposes.

[6] Various species of spiders use silk extruded from spinnerets to build webs, to transfer sperm, to entrap insects by wrapping it around them, to make egg-cases, to manipulate static electricity in the air, and to fly (ballooning), etc.

Some insect larvae (including silkworms) extrude silk to make a protective cocoon for their metamorphosis.

The insects known as web spinners weave silken galleries for protection from predators and the elements while foraging and breeding.

[7] Observations suggesting that there might be silk-producing organs on the feet of the zebra tarantula (Aphonopelma seemanni) led to questions about the origins of spinnerets.