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The labia are the major externally visible structures of the vulva. In humans and other primates , there are two pairs of labia: the labia majora (outer lips) are large and thick folds of skin that cover the vulva's other parts, while the labia minora (inner lips) are the folds of skin between the outer labia that surround and protect the ...
In primates, and specifically in humans, the labia majora (sg.: labium majus), also known as the outer lips or outer labia, are two prominent longitudinal skin folds that extend downward and backward from the mons pubis to the perineum. [1] Together with the labia minora, they form the labia of the vulva. The labia majora are homologous to the ...
Cupid's bow feature of a human lip. The upper and lower lips are referred to as the labium superius oris and labium inferius oris, respectively. [2] [3] The juncture where the lips meet the surrounding skin of the mouth area is the vermilion border, [4] and the typically reddish area within the borders is called the vermilion zone. [5]
Underneath skin of lower lip Opening mouth and sliding lower jaw left and right: Lower jaw: Depression, lateral: Depressor angulus oris: Mandible: Underneath skin at corners of mouth Smiling: Corners of mouth: Lateral elevation: Zygomaticus major: Zygomatic bone: Underneath skin at corners of mouth (dimple area), orbicularis oris: Shaping of ...
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 lower part passes beneath the glans clitoridis and becomes united to its under surface, forming, with the inner lip of the opposite side, the frenulum clitoridis. [ 5 ] The clitoral hood serves to cover most of the time the shaft and sometimes the glans (which is very sensitive to the touch) to protect the clitoris from mechanical ...
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3]
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 ...