Details: This blacklight poster shows a viper snake with its mouth open. Its fangs and forked tongue are visible.
Vipers are a family of venomous snakes found all over the world, except in Antarctica, Australia, Newfoundland, New Zealand, Ireland, Madagascar, Hawaii and the Arctic Circle. All have relatively long hinged fangs that permit deep penetration and injection of venom. Viperid venoms typically contain an abundance of protein-degrading enzymes, called proteases, that produce symptoms such as pain, strong local swelling and necrosis, blood loss from cardiovascular damage complicated by coagulopathy, and disruption of the blood clotting system. Death is usually caused by collapse in blood pressure.