The world’s biggest spider is the goliath spider ( Theraphosa blondi).They are found in southeastern Asia, China, and Japan and are over 4 inches across, including their legs. Giant trapdoor spiders are considered living fossils because they are similar to spiders that lived over 300 million years ago.Each one is like a tiny showerhead that has hundreds of holes, all producing liquid silk. Spiders have between two and six spinnerets at the back of their abdomen.Children and elderly people are especially susceptible. The effects of a spider bite vary according to several factors, including the amount of venom injected and the size and age of the person who was bitten.Black widow bites can also cause other nerve-related problems, such as high blood pressure, restlessness, and severe facial spasms. The venom of the black widow spider attacks nerves by blocking their signals to the muscles, which causes the muscles to contract repeatedly and often painfully.A dead spider’s legs are curled up because there is no fluid to extend the legs again. Instead, it must pump a watery liquid into its legs to push them out. A spider’s muscles pull its legs inward, but cannot extend its legs out again.Spider legs use hydraulic pressure to move In spiders, oxygen is bound to hemocyanin, a molecule that contains copper rather than iron. In humans, oxygen is bound to hemoglobin, a molecule that contains iron and gives blood its red color. This can lead to other symptoms, such as acute kidney injury and jaundice. For example, the brown recluse venom may cause red blood cells to burst. In rare instances, some spider bites can cause blood disorders.In early comic books, the radioactive spider that bites Peter Parker is incorrectly referred to as an insect. Spider-Man is one of the most popular superheroes.Abandoned spider webs are called “cobwebs.” The word “cob” is an obsolete word meaning “spider” and is a shortened form of the Old English word attercop, which literally means “poison head.” Etymologists see a connection between cob for spider and cob for corn in that a cob of corn means the “head” or “top” of the corn.The Bagheera kiplingi is the world’s only (mostly) vegetarian spider.When a spider travels, it always has four legs touching the ground and four legs off the ground at any given moment.
Additionally, a spider’s body has a special oily substance that keeps it from getting stuck in its web.
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