All viperines have a pair of relatively long, solenoglyphous (hollow) fangs, that are used to inject venom from glands located towards the rear of the upper jaws.
All viperines have a pair of relatively long, solenoglyphous (hollow) fangs. A pair of relatively long, solenoglyphous (hollow) fangs are used to inject venom from glands. These glands are located towards the rear of the upper jaws.