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Venomous snakesarespeciesof thesuborderSerpentesthat are capable of producingvenom, which they use for killing prey, for defense, and to assist with digestion of their prey. The venom is typically delivered by injection using hollow or groovedfangs, although some venomous snakes lack well-developed fangs. Common venomous snakes include thefamiliesElapidae,Viperidae,Atractaspididae, and some of theColubridae. The toxicity of venom is mainly indicated by murineLD50, while multiple factors are considered to judge the potential danger to humans. Other important factors for risk assessment include the likelihood that a snake will bite, the quantity of venom delivered with the bite, the efficiency of the delivery mechanism, and the location of a bite on the body of the victim. Snake venom may have bothneurotoxicandhemotoxicproperties. There are about 600 venomous snake species in the world.

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