Spiders

Spider silk can be found in every environment in the world except air and sea. (Spider Biology, R. Foelix) These invertebrate invertebrates are one of several groups of spiders with approximately 34,000 species. Their volume ranges from a few millimeters to almost 5 inches. Everyone is carnivorous, with four legged foot, one pediatric ankle, and a pair of chechelerae. (Spider, W. Shear) Each chelicerae consists of a base and a tooth.

Spiders belong to arthropods, but not all spiders are not necessarily spiders. Approximately 40,000 spiders are known. Most spiders use the net to capture prey, usually insects. The biggest spider is a huge tarantula that catches birds. The world's smallest spider's length is less than 1 mm. Regardless of which spider is made, they are made by producing silk. It comes from the glands of the abdomen, and each gland produces different kinds of silk - some are sticky, some are thin and some are used to construct different parts of the mesh. Spider silk is very strong - it needs to capture prey and keep baby's spider safe. Tarantula can also produce silk from the feet

Spiders are elastic, sticky, and make strong silk. This silk is used for the construction of a net of fabrics, oocysts and spider clad houses. The size and shape of the spider web differs from species to species: spherical and funnel shaped; some are regular and some are random. Some spider species live in caves rather than meshes, but others are evacuating to cracks, free-ranging.

Spider silk is a protein fiber spun from a spider. Spiders make net and other structures to capture other animals as sticky nets using their own silk, or protect their descendants as nests or crickets, or wrap prey. They can hang themselves with their own silk, float in the air, glide from predators. Most spiders change the thickness and viscosity of silk for various purposes. All spiders produce silk and a single spider can produce up to seven different types of silk for different uses. This is in contrast to insect silk, which usually produces only one type of silk. Spider silk can be used in various ecological ways, each having characteristics matching the function of silk. Along with the evolution of spiders, the complexity and usage of silk has changed from an original pipe network of 300 to 400 million years ago to a complex spherical network of 110 million years ago.