Parts of the Mouth & Associated Facial Markings

Superior mucous membranes of upper lip

The upper margin has the shape of the classic hunting bow. The medial lobe is found in the center of the membrane. Narrows laterally as it disappears before reaching the end of the line of closure. Contains two high peaks slightly off center in either side of a dipping curve

Labial sulci

The vertical furrows on the lip extending from within the mucous membranes into the integumentary lips

Philtrum

The vertical groove located on the superior integumentary lip. The width, form, and depth are different from person to person

Mucous membrane

The visible red surfaces of the lips; the lining membrane of the body cavities that open to the exterior

Vertical lines of the mucous membrane

Fine vertical lines located on the mucous membranes

Inferior mucous membrane of upper lip

Is thicker than the superior mucous membrane. Lies posterior to the upper mucous membrane

Superior integumtary lip

The area between the base of the nose and the superior margin of the superior mucous membrane

Inferior integumentary lip

The area between the inferior margin of the inferior mucous membrane and the mental eminences

Angelus oris sulcus

The groove at the end of the line of closure

Weather line

The line of color change at the junction of the wet and dry portions of the mucous membranes. The area where adhesive is applied to keep lips closed

Line of closure

The line that forms between the two mucous membranes when them mouth is closed and the lips come in contact with each other. Usually located at the lower border of the upper teeth. Has the shape of the classic hunting bow

Medial lobe

The tiny prominence on the midline of the superior mucous membrane