面部皱纹 脸部出现皱纹,是人体老化的象征之一,是岁月在脸上留下的痕迹。人的皮肤由表皮、真皮和皮下组织构成。其中,真皮是形成皱纹最重要的部分。真皮又分为乳头层及网状层,在网状层中有胶原纤维束,其间穿插缠绕着弹力纤维,并与皮肤表面平行排列。胶原纤维没有伸缩性,在皮肤伸展时可以拉直,而弹力纤维有弹性,保持皮肤不能过度伸展。另外,在表皮与 Facial wrinkles Face wrinkles, is one of the symbols of human aging, is the mark of years left on the face. Human skin consists of epidermis, dermis and subcutaneous tissue. Among them, the dermis is the most important part of the formation of wrinkles. Dermis is divided into nipple layer and mesh layer, in the reticular layer of collagen fibers, interspersed with elastic fibers interspersed during the parallel arrangement with the skin surface. Collagen fibers are non-stretchable and can be straightened as the skin stretches, while elastic fibers are elastic to keep the skin from over-stretching. In addition, in the epidermis and