Spider web with morning dew enhancing its visibility.

Spider web early in the morning

Cobwebs on a fence in Annapolis, Maryland

Spider Web

A spider web is a device built by a spider out of proteinaceous spider silk extruded from its spinnerets. The most familiar spider webs are those used for catching flying insects, but some are used to ensnare small vertebrates, and others only provide shelter. Webs typically contain multiple types of strands, including sticky and non-sticky ones. Some of these strands are stronger than steel strands of the same thickness; the microstructure of this material is under investigation for potential applications in industry. Description: Photograph of a spider web with morning dew enhancing its visibility. ... Description: Photograph of a spider web with morning dew enhancing its visibility. ... Spider early in the morning File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Spider early in the morning File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Download high resolution version (2048x1536, 1175 KB) Cobwebs on a fence in Annapolis, Maryland Taken 8/2004 by User:Rdsmith4 File links The following pages link to this file: Spider web Image:Cobwebs on fence. ... Download high resolution version (2048x1536, 1175 KB) Cobwebs on a fence in Annapolis, Maryland Taken 8/2004 by User:Rdsmith4 File links The following pages link to this file: Spider web Image:Cobwebs on fence. ... City nickname: Americas Sailing Capital Location in the state of Maryland Founded 1649 Mayor Ellen O. Moyer ( Dem) Area  - Total  - Water 19. ... Spider Web Taken by fir0002 File links The following pages link to this file: Spider web Categories: GFDL images ... Spider Web Taken by fir0002 File links The following pages link to this file: Spider web Categories: GFDL images ... Families Suborder Mesothelae     Liphistiidae (primitive burrowing spiders) Suborder Mygalomorphae     Atypidae (atypical tarantula)     Antrodiaetidae (folding trapdoor spider)     Mecicobothriidae (dwarf tarantulas)     Hexathelidae (venomous funnel-web tarantula)     Dipluridae (funnel-web tarantula)     Cyrtaucheniidae (wafer trapdoor spider)     Ctenizidae (trapdoor spider)     Theraphosidae (tarantula) Suborder Araneomorphae     Hypochilidae (lampshade spider)     Filistatidae (crevice weaver)     Sicariidae (recluse spider)     Scytodidae (spitting... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... A spider web made by a linyphid spider Spider silk is a fibre secreted by spiders. ... A spinneret is a spiders silk spinning organ. ... Orders Subclass Apterygota Symphypleona - globular springtails Subclass Archaeognatha (jumping bristletails) Subclass Dicondylia Monura - extinct Thysanura (common bristletails) Subclass Pterygota Diaphanopteroidea - extinct Palaeodictyoptera - extinct Megasecoptera - extinct Archodonata - extinct Ephemeroptera (mayflies) Odonata (dragonflies and damselflies) Infraclass Neoptera Blattodea (cockroaches) Mantodea (mantids) Isoptera (termites) Zoraptera Grylloblattodea Dermaptera (earwigs) Plecoptera (stoneflies) Orthoptera (grasshoppers, crickets... Typical classes Petromyzontidae (lampreys) Placodermi - extinct Chondrichthyes (cartilaginous fish) Acanthodii - extinct Actinopterygii (ray-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Amphibia (amphibians) Reptilia (reptiles) Aves (birds) Mammalia (mammals) Vertebrata is a subphylum of chordates, specifically, those with backbones or spinal columns. ... Steel framework Steel is a metal alloy whose major component is iron, with carbon being the primary alloying material. ...

In spiders, there are several glands located at the spider's abdomen which produce the silken thread. Every gland produces a thread for a special purpose with several different glands currently identified, although spiders each possess only a few of these glands, never all seven at once.

Normally a spider has three pairs of spinnerets, but there are spiders with just one pair or as many as four pairs of spinnerets, with each spinneret having its own function.

To the curious or ingenious among the perusers of this article, it may not be uninteresting to know that a beautiful impression may be taken on paper of the reticulated web of the field-spider, by sprinkling it finely with any dark-coloured liquid, and placing the paper intended for the impression behind the web, and drawing it gently towards you. The idea that an impression might be produced in this manner was suggested by observing the dew on the web in the morning.

Glands

• Glandula Aggregata - for sticky material
• Glandula Ampulleceae major and minor - for walking thread
• Glandula Pyriformes - for attaching threads
• Glandula Aciniformes - for encapsulating prey
• Glandula Tubiliformes - for cocoons
• Glandula Coronatae - for adhesive threads

Cocoon has a number of meanings. ...

Sources

• Ed Nieuwenhuys, The Spider Web and Thread. March 2002.