How and Why Do Spiders make Webs?

How and why do spiders make webs?

How does a spider make silk?

Spinnerettes

Abdomen

Legs Eyes Pedipalps

Mouth Inside the abdomen are 6 types of spinning glands, where each type of gland secretes a particular kind of silk.

For example, one gland produces silk of the sticky spiral and another produces the drag line silk.

Spinnerettes

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In the spinning glands, syrup-like blends of liquid protein are manufactured in soluble forms, but when pulled out of the spinnerrettes the fibres become solid and insoluble.

This conversion is due to a change in orientation of molecules .

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The ill make a bridge thread ying on the breeze.

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will run across the th

silk to make

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will then create the “f be the same angle in betw 100 threads

The spider frame threads�. There has to ween each thread. There can be up to s at the end of this process.

will now work in a sp dry thread so that the spi so the prey can be caught of the

The spider piral behaviour to do create a ider can move, and then a sticky web t. The spider will tend to dodge the centre e web so it can sit and wait for prey.

the web is finished th prey to come by waiting fo prey is ca

Now that he spider will sit and wait for or vibrations on the threads when the aught in the sticky thread.

Sensory Enhancement:

The silk lines where the spider waits will vibrate for two reasons: potential partner (the spider will pluck o prey (the insect will be stuck in the web be trying to get out)

Why d spiders mak

Prey Capture and the Preservatio

An insect will fly into the sticky silk line the thread will tell the spider that the p then kill the prey and wrap silk around will stick to the web.

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on web) and

do ke webs?

on of Prey:

es and get trapped. The vibrations from prey is there and head to the prey. It will d it for future meals. The preserved prey

By Deanna Carey

And Rachel Tunstall