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| The spider walking on straight threads Wikimedia Commons by John Allan |
The spider makes a web from the sap which comes out of
its glands.
These special glands are located in the spinneret organ located in
the underside or rear of the abdomen of the spider or the caterpillar.
A spider
has two or three spinnerets.
The spinneret is the silk spinning organ from
where the spider ejects a liquid through long ducts leading to very small or microscopic
spigots.
The spiders have two or three spinnerets.
The liquid coming out of the spinnerets gets hardened
outside the body of the spider and gets transformed into a strong fiber.
These
fibers are used to form the web.
The web has two types of fibrous elements.
The
dry fiber makes the frame of the web. The spokes or cross lines of the web are
made of a sticky fiber which traps the insects.
The spider walks over the dry
fibrous frame to reach the trapped insect and that is why the spider does not
get trapped in its own web.
On the other hand the body of the spider is naturally
coated with an oily layer which minimizes its chances of getting trapped in its
own web.
