Why Do Spiders Exist?
WouterSpiders are important predators in the environment. They are known to control insect populations in every ecosystem. There are thousands of species of spiders around the world. Some are harmless and some are dangerous.
Some of the more dangerous species include black widows and brown recluses. These spiders can be dangerous if they bite humans. But most of the spiders are not harmful to humans. In fact, most spiders do not bite unless they are attacked or threatened.
A spider’s body is composed of two main parts, the cephalothorax and the abdomen. The cephalothorax is where the mouth is located and the abdomen is where the reproductive organs are. All spiders produce silk. This protein fiber is strong and is used for a number of purposes. It is also used to make fishing nets and clothing.
When a spider lays eggs, it encloses the sac in a silken egg sac. The egg sac is buried in a web or on the surface of the ground. The baby spiders emerge from the sac.
Spiders have six or eight eyes depending on the species. Some spiders have two pairs of eyes, while others have a small inner lens that magnifies the image from the larger outer lens.
Spiders are found all over the world except Antarctica. Many of them are carnivorous, and they eat a variety of insects. Although spiders are beneficial to humans, they often get a bad rap. If they disappeared, they would be a threat to the health of the planet.
