Spiders have organs that can spin silk and weave webs. Spiders have three pairs of protrusions on their abdomen, which are called spinnerets. There are many textile tubes on the spinning machine, which communicate with the silk glands in the body. Silk gland is connected with the surface spinner at the back of abdomen through many microtubules, which can secrete liquid bone protein. After bone protein is sprayed out, it will harden when exposed to air and become silk thread, which will be woven into a net layer by layer.
The principle of spider spinning:
There are six kinds of glands in the abdomen of spiders, which are called spinnerets. Various glands produce different types of spider silk. There is a spinneret at the top of the gland with thousands of holes on it. The sprayed liquid condenses into spider silk when it meets air, which has strong viscosity and great tension.
Most spiders have poisonous glands, with claws and claws. Most burrowing spiders move up and down, but they prey on the ground, and spiders that web in the air sweep around like pliers. No tentacles, no wings, no compound eyes, only one eye, usually 8 eyes, but there are also 6, 4, 2 eyes, and some even have no eyes. As far as the color and function of eyes are concerned, they can be divided into day and night.