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why do snakes have teeth and fangs

Herpetologists classify snakes in four primary groups according to the type of fangs they possess. Snakes without venom-injecting teeth of any kind are called aglyphous; they have varying amounts of teeth, but none modified for envenomation. Opisthoglyphous snakes are often colloquially called Бrear-fangedБ snakes, as their fangs reside at the rear of the maxilla, right below the eyes.

Most opisthoglyphous snake fangs have a groove or channel down which venom flows into a wound. Proteroglyphous snakes have relatively small, hollow fangs at the very front of their mouths, which transmit venom directly into the body of their prey. Finally, solenoglyphous snakes have hollow fangs that are so large they must fold flat against the roof of the snakesБ mouths to allow the snakes to close their mouths properly.
Other that possibly frightening someone whoБs unfamiliar with snakes, the only real harm the bull snake can inflict on humans is a potentially painful bite.

All North American non-venomous snakes have four rows of solidly fixed, backward curving teeth in the bottom jaw and four in the top.

TheyБre well equipped to quickly replace teeth, which are often broken or lost during feeding. The bull snake uses these weapons to snag and hold prey firmly as it wraps constricting coils around the struggling animal. The teeth БwalkБ the animal toward snakeБs throat, aiding the reptile with swallowing

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