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The fleshy protuberance located in the center of the upper lip is a tubercle known by various terms including the procheilon (also spelled prochilon), the "tuberculum labii superioris", and the "labial tubercle". [7] The vertical groove extending from the procheilon to the nasal septum is called the philtrum. [8] Surface anatomy of the human lips
In human anatomy, the mouth is the first portion of the alimentary canal that receives food and produces saliva. [2] The oral mucosa is the mucous membrane epithelium lining the inside of the mouth. In addition to its primary role as the beginning of the digestive system, the mouth also plays a significant role in communication.
The commissure is the corner of the mouth, where the vermillion border of the superior labium (upper lip) meets that of the inferior labium (lower lip). The commissure is important in facial appearance, particularly during some functions, including smiling. As such it is of interest to dental surgeons.
It is characterised by the presence of crusting blisters on the upper lip. [18] Chickenpox: A type of viral infection which is caused by varicella zoster virus and presents in children. Numerous itchy blisters are found on the face and body. Blisters could also be found on inner cheek and palate of the mouth. [18]
In the upper lip, these consist of two bands, lateral and medial, on either side of the middle line; the lateral band m. incisivus labii superioris arises from the alveolar border of the maxilla, opposite the lateral incisor tooth, and arching lateralward is continuous with the other muscles at the angle of the mouth; the medial band m ...
The skin of the face is thicker than the skin overlying the lips where blood vessels are closer to the surface. As a consequence, the margin of the lips shows a transition between the thicker and thinner skin, represented by the vermilion border. It therefore has the appearance of a sharp line between the coloured edge of the lip and adjoining ...
The same can be said for genitalia, including the labia, which are the inner and outer folds of the vulva, consisting of four “lips” — the labia minora (inner) and the labia majora (outer ...
In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. [4] For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip. [5]