Lips are a visible body phase at the mouth of humans and lots of animals. Lips are tender, movable, and function the opening for meals consumption and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can also be erogenous when used in kissing and different acts of intimacy.
The upper and decrease lips are referred to as the “Labium superius oris” and “Labium inferius oris”, respectively. The juncture the place the lips meet the encompassing pores and skin of the mouth space is the vermilion border, and the typically reddish area within the borders is referred to as the vermilion zone. The vermilion border of the upper lip is often called the cupid’s bow. The fleshy protuberance situated in the center of the higher lip is a tubercle recognized by means of quite a lot of terms together with the procheilon (additionally spelled prochilon), the “tuberculum labii superioris”, and the “labial tubercle”. The vertical groove extending from the procheilon to the nasal septum is called the philtrum. The pores and skin of the lip, with three to five cell layers, is very skinny in comparison with conventional face pores and skin, which has up to 16 layers. With mild pores and skin coloration, the lip pores and skin comprises fewer melanocytes (cells which produce melanin pigment, which give pores and skin its color).