Open or closed, full or fine, smiling or sad, the mouth determines the whole lower part of the face.
The movement of the mouth varies depending on what sound is being pronounced. The vowels are called “palatal” because they are articulated at the level of the palate.
Breakdown of the mouth
The Lips
The upper lip is usually less fleshy than the bottom lip and pushes further forward. The lips become thinner where they come together at the corners of the mouth, or “commissures.”
Even when the mouth is closed, even just a slight movement ...
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