The beautiful face is the moving passport of the woman.

A healthy and beautiful face is a moving passport for women. Having a moving pass allows you to face the world and face your life with ease. And how to have this beautiful and healthy face has always made all our women pay their attention, as if having a beautiful face has become a burden on our hearts. How can beauty tolerate physical and mental fatigue, how can it be at the expense of happiness and health?

In fact, there is no secret to relaxing beauty. When you enjoy a quiet life like a quiet day, it is the best and most true to face life with a simple smile. Knowing your skin is beautiful, human skin is beautiful, and beautiful skin is lovely. If you want to have beautiful skin, then you must first have a good understanding of the skin. The skin is a soft, uniform, and extensible protective film on the surface of the human body. On the surface, it is just the outer layer of the body. In fact, in addition to protecting the body from bacteria, cold, heat, ultraviolet rays and other external injuries, the skin also has functions such as excretion, body temperature and feeling.

The skin covers the outermost surface of the human body and plays a very important role. The epidermis has a keratinized layer and a sebum membrane to prevent chemical irritation and prevent evaporation of water. In addition, it also contains melanin , which is resistant to ultraviolet rays. The leather is highly tough and prevents mechanical damage. The nerve endings in the skin are rich and can feel various stimuli. Structure of the skin The entire body surface of the human body is covered with skin. The skin is soft tissue, flexible and elastic, and can be pushed and stretched within a certain range. The thickness of the skin varies with age, gender, and location.

The skin is the largest and most important organ in the human body. The total weight is about 8% of the human body. The skin contains about 1/3 of the circulating blood and about 1/4 of the body's water. The skin is composed of three parts: epidermis, dermis and subcutaneous tissue. Epidermis: It is a tissue on the skin. It has the most contact with the outside world and is the most closely related part of cosmetics . Although the epidermis is almost as thin as plain paper and 0.2 mm thickest at the thickest, they are all developed from the underlying basal layer. The basal layer is composed of basal cells and melanocytes. Melanocytes produce melanin and basal cells continuously Split and produce new cells. The color of the skin varies from person to person, and the color of the different parts of the same body varies.

The color of the skin depends on the amount of melanin contained in the skin and the speed of blood flow. The skin after being sun-tanned contains more melanin and the skin gradually darkens. After exercise, the blood vessels flow faster and the skin becomes red. . Dermis: The dermis is in the lower layer of the epidermis, which is distinct from the epidermis. The bottom of the epidermis is convex and concave and closely in contact with the dermis. There are few cells inside the dermis, which are mainly composed of plant fiber connective tissue. Among them are collagen fibers, elastic fibers and reticular fibers, which have important relationships with the elasticity, luster and tension of the skin. Skin aging, wrinkling and other aging occur under the dermis. Subcutaneous tissue: The subcutaneous tissue is under the dermis, and there is no obvious boundary between the two. The subcutaneous tissue is composed of a large amount of adipose tissue dispersed in loose connective tissue.