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July 27, 2010

5 types of the most dangerous spider

Spiders contribute to countless terrestrial ecosystems. They cleanse the population of harmful insects, plants and animals maintain important. Their silk, are a marvel of nature, and can be used for military and industrial applications for humans. Here are five most deadly spider known to humans.

The Red Back Spider.

Redback spider (Red Back) found all over Australia. Redback females are usually black with traces of red and orange stripes on the back. This spider has a neurotoxic venom, and when the bite can cause muscle weakness, nausea, vomiting and sweating. The most fatal, causing paralysis and death.

The Funnel -Web

Funnel spider-web is also from Australia. Funnel-web males shiny black or brown. This spider when attacked, stand with their hind legs, exposing their tusks. They also have neurotoxic venom and their bites can cause saliva, sweating, seizures, and the tears. Even just by looking at them, you can shed tears.

The Brazilian Wandering.

Brazilian Wandering spider found in South American forests. They are nervous and aggressive. Bite is extremely painful, because they release serotonin into the bloodstream victims. Serotonin can make you die as affected by a drug overdose.

The Brown Recluse

This little spider, has a violin-shaped backs. Brown Recluse Spider venom causes small bump. Bites were also does not hurt, but make no mistake, these small bump, and then will rot and be separated from the victim's body.  

The Black Widows

This spider is probably the most deadly. Shiny black spider is found in North America. Neurotoxic venom when they bite is painless, with two fang marks a clear afterward. Bite symptoms, including stomach and back pain, muscle cramps, abdominal, respiratory failure, high blood pressure, anxiety, and if bitten too long, will cause death.  


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