Mon Prof Augmenté
Silk from the Spider’s Abdomen
Age 11 · Animals
Inside a spider’s abdomen, silk is kept as a liquid in small sacs. The spider squeezes that liquid through tiny nozzles, and it comes out as a thin solid thread.
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Age 11: open this week
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In the picture
- A silk gland: a sac holding silk as a liquid
- A narrow duct: the tube that carries the liquid silk
- A spinneret: the tiny nozzle where the liquid leaves the body
- The drawn thread: silk that has set into a solid strand
Examples
- A tube of toothpaste squeezed into a thin line
- A glue gun pushing out a thread of glue that hardens as it cools
Key takeaways
- Spiders store silk as a fluid and shape it into thread outside the body.
- A spider has several nozzles, so it can make more than one thread at a time.
Quiz: Silk from the Spider’s Abdomen (Age 11)
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How does a spider store silk inside its body?
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What happens to the silk as it leaves the spider through a spinneret?
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Why can a spider make more than one thread at a time?
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