How must rear-fanged snakes typically engage to effectively inject venom deep into tissue?

Answer

They usually need to chew or hold onto the threat for effective injection

Because they possess rear fangs, rear-fanged snakes generally require a mechanism that involves chewing or holding onto the target to ensure the venom is injected deep enough into the tissue for proper envenomation.

How must rear-fanged snakes typically engage to effectively inject venom deep into tissue?
ToxicityvenomreptilesnakeKeelback