One special thing about a spider is that it can spin a silk web. The silk comes from inside the spider's body through small holes at the back of the body called spinnerets. The silk comes out as a liquid but quickly dries in the air. It is very strong and looks like a long strand of hair. The teacher shows a thin, long piece of silk thread.
Spiders also make draglines out of the same sticky, liquid silk.
A dragline is a very long strand of silk that allows spiders to hang in the air. They use the draglines to capture prey, the same way as with a web. Spiders have many eyes but cannot see very well. There are over 30,000 different types of spiders that scientists have been able to study. Most of them are very small and not dangerous.