Customer Support. Busey Holidays Observed New Year's Eve all facilities close at 5 p.m. New Year's Day all facilities closed Martin Luther King Day customer support available 8 a.m. - 1 p.m. CST Presidents' Day customer support available 8 a.m. - 1 p.m.
Orbicularis oris muscle. In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. Until recently, it was misinterpreted as a sphincter, or circular muscle, but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.
Lip - Structure. 1  The upper and lower lips are referred to as the Labium superius oris and Labium inferius oris, respectively. [1] [2] The juncture where the lips meet the surrounding skin of the mouth area is the vermilion border, [3] and the typically reddish area within the borders is called the vermilion zone. [4]