Venomous Frogs Use Heads as Weapons

摘要: Venomous animals have toxins associated with delivery mechanisms that can introduce the into another animal. Although most amphibian species produce or sequester noxious toxic secretions in granular glands of skin to use as antipredator mechanisms, amphibians been considered poisonous rather than venomous because are absent. The two Brazilian hylid frogs (Corythomantis greening and Aparasphenodon brunoi) more venoms deadly pitvipers, genus Bothrops; C. greeningi secretion is 2-fold A. brunoi 25-fold lethal Bothrops venom. Like other animals, these show proteolytic fibrinolytic activity hyaluronidase, which nontoxic nonproteolytic but promotes diffusion toxins. These well-developed utilizing bony spines on skull pierce areas concentrations glands. has greater development head enlarged producing a volume secretion, while highly an mechanism; they therefore venomous. Because even tiny amounts introduced wound caused by could be dangerous, capable using their against would-be predators.