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Everyone knows what a lip is but I'm asking from a technical and anatomical standpoint.

Actually what we call "lip" is "vermilion" in medical terminology. But I want to ask if my understanding is right or not regarding to surface anatomy of the lip.

Lip consists of two parts called upper lip and lower lip. And upper lip and lower lip consists of two parts: skin (cutaneous) part and vermilion part (vermilion is a special kind of skin also but we do not call it skin).

Lip = upper lip (upper cutaneous lip + upper vermilion) + lower lip (lower cutaneous lip + lower vermilion)

This is a diagram that depicts the upper lip portion: enter image description here



Am I right so far? Did I miss any points?

Is the term "upper lip" ever used for the skin (cutaneous) part only? (especially in surgical terminology and reconstruction surgeries)

Are the "upper cutaneous lip" and "lower cutaneous lip" terms established terms in medicine? Are there any other names or latin names for those? (I also see the usage of "cutaneous upper lip" and "cutaneous lower lip")

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