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Anna007 [38]
3 years ago
8

Pow! a firecracker explodes close to you. your mouth drops open in surprise, a movement known as:

Biology
1 answer:
prohojiy [21]3 years ago
4 0
When the mouth opens wide and your chin drops, the movement is known as depression movement, which occurs in the <span>temporomandibular joint. This movement occurs naturally when we are surprised or shocked due to a certain event, it is also considered to be a common facial expression.</span>
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