Complex sentence: Elapid snakes exist in a wide range of sizes, from 18 cm species of "Drysdalia" to the 5.6 m King Cobra, and are characterized by hollow, fixed fangs through which they inject venom from glands located towards the rear of the upper jaws.
Split into simpler sentences: Elapid snakes exist in a wide range of sizes, from 18 cm species of "Drysdalia" to the 5.6 m King Cobra, and are characterized by hollow, fixed fangs through which they inject venom. All elapids have a pair of proteroglyphous fangs that are used to inject venom from glands located towards the rear of the upper jaws.