Human lips are also a somatosensory organ, and can be an erogenous zone when used in kissing and other acts of intimacy.

The surface of the lip is comprised of four zones: hairy skin, vermilion border, vermilion and oral mucosa. The normal shape of the lips varies with age, and is influenced by ethnicity.

The meaning of LIP is either of two fleshy folds that surround the mouth in humans and many other vertebrates and are organs of human speech essential to certain articulations; also : the red or pinkish margin of the human lip.

Get a quick, free translation! LIP definition: 1. one of the two soft parts that form the upper and lower edges of the mouth: 2. a part of an…. Learn more.

lips, soft pliable anatomical structures that form the mouth margin of most vertebrates, composed of a surface epidermis (skin), connective tissue, and (in typical mammals) a muscle layer. In man the outer skin contains hair, sweat glands, and sebaceous (oil) glands.

The upper lip complex refers to the anatomical structures and features of the upper lip region. Understanding the upper lip complex really helps to achieve desired aesthetic outcomes when you’re looking into cosmetic procedures such as lip lifts and lip augmentations.

It is composed of skin, muscles, mucous membranes, and connective tissue. The lips are highly sensitive and play a significant role in speech, eating, and facial expressions. The lips consist of two parts: the upper lip and the lower lip, separated by the oral fissure (mouth opening).