口唇是一个多功能的混合性器官,还是构成人的容貌美的重要部位之一,娇艳柔美的朱唇是女性风采的突出特征,在达芬奇的著名肖像画《永恒的微笑》中,美就美在口唇上。口唇分为上唇和下唇,两唇之间的裂隙称为口裂(俗称口)。口裂的两端称口角。上下唇均由皮肤、口轮匝肌、疏松结缔组织及粘膜组成。唇的外形,由皮肤部、红唇部和粘膜部组成。由于红唇部极薄,没有角质层和色素,所以能透出血管中的血液颜色,而显得格外红润,极富魅力。此处也是女性涂抹口红的地方,在唇化妆中占有特别重要的地位。在上唇的中部有一个凹沟,名为人中,这是人类特有的结构,也是构成口 Lip is a multi-functional mixed organ, or constitute one of the important parts of the beauty of the human face, tender and beautiful lips is a prominent feature of women’s style, the famous portrait of Leonardo da Vinci, “eternal smile,” the United States in the lips on. The lip is divided into upper lip and lower lip, the gap between the lips is called the split (commonly known as the mouth). Cracked ends of the mouth called mouth. Upper and lower lips by the skin, orbicularis muscle, loose connective tissue and mucous membranes. The shape of the lip consists of the skin, red lips and mucous membranes. Due to the extremely thin red lips, no cuticles and pigments, it can reveal the blood color of the blood vessels, which appear particularly rosy, very attractive. Here is where women smear lipstick, lip makeup occupies a particularly important position. In the middle of the upper lip has a groove, named man, which is a human-specific structure, but also constitute the mouth