Spider webs

How do spiders make their silk?

A spider unrolls its web from its silk glands. Most spiders have five silk glands located in the abdomen. Each gland produces a different type of silk. Some glands produce silk that dries outside the body, other glands produce sticky silk. Spinnerets are like short fingers; they are organs attached to the back of the abdomen that the spider uses to spin silk. The end of the spinneret is called the spinning field. Each spinning field is covered with several hundred spinning tubes; Through these tubes, the liquid silk flows from the abdomen towards the outside of the body, the silk then hardens in a thread. Spinnerets work a little like the fingers of one hand, spiders can stretch, pull and combine silk threads to create threads of different sizes.

Spinning field

Spider releasing silk

Fun fact

In fact, spiders do not have an unlimited supply of silk. However, it is not a problem because they can fall from high distances and not be injured.

How do spiders spin their webs?

STEP 1: First, the spider releases a silk thread that it attaches to an anchor point. It then moves to the opposite side of the surface and attaches the local end. The spider will then return on these steps to the first anchor point to reinforce the original line.

STEP 2: The spider then attaches a new strand to this point, and crosses once again the same line but this time leaving behind a looser silk strand. The loose silk strand is then attached to the other side and the spider then falls to the center of the loose line that it has just secured to form a V. It now attaches a new silk line and descends to the solid point secured and fixes this to form a Y shape.

Step 3: Once it has secured it’s Y shape the spider then lays the radial spokes and sets the boundary lines. It then starts to spin a loose spiral from the center of the web outwards to the chosen boundary.

Step 4: After, the spider then returns to the center and starts to spin a tighter spiral which begins to fill in the web.

Step 5: Finally, it completes the spiral and then designs a hide at the edge of the web and waits at that point with a leg on one of the radial spokes until her potential prey stumbles or flies into the trap.

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