Snakes do not “dislocate” their jaws to swallow
The common claim that a snake “unhinges” or dislocates its jaws is inaccurate. A snake’s skull has several mobile joints, and the left and right halves of its lower jaw are connected by an extensible ligament rather than being rigidly fused as in humans. This lets the jaws spread widely and move more independently.
Illustration is AI-generated and conceptual; it does not show every bone.
During swallowing, many snakes alternately advance the left and right sides of the jaw apparatus over the prey, moving it inward step by step. Stretchable skin and tissues around the mouth also help accommodate large prey. This is normal anatomical mobility, not a traumatic dislocation.