Do you know your skin? Skin type and structure.

　　Skin is a type of tissue on the surface of the human body that is in direct contact with the external environment. Covering the outermost layer of the human body, it plays an extremely important role in protecting the human body.

　　The skin is the largest organ of the human body. The skin area of an adult is 1.5-2 square meters, and the total weight accounts for 16% of the human body.

　　Classification of skin

　　Normal skin is the best skin. The texture of the skin is fine, shiny, elastic, and the sebum film is moderately acidic. The pH value is between 5 and 5.6. The skin is neither oily nor dry.

　　Disadvantages: The better the skin, the more difficult it is to maintain, and it is easy to become dry or oily.

　　Dry skin has fine texture, lacks luster, no elasticity, thin sebum film, acidic, with a pH value of 4.5-5, and dry skin is dehydrated.

　　Disadvantages: easy to grow aging wrinkles, easy to dehydration allergies

　　Oily skin is the skin that is not easy to age. The pores are large, the skin is shiny, shiny, elastic, the sebum film is thick, and the pH value is weakly alkaline between 5.6-6.6, and the oil secretion is strong.

　　Disadvantages: skin is dark, thick, black and yellow, prone to pimples and scars

　　Combination skin is the most common skin, accounting for 80% of the population. The "T" part of the face is oily, and the cheeks and around the eyes are dry.

　　Disadvantages: wrinkles around the mouth and eyes, spots on the cheeks

　　The structure of the skin

　　The skin is divided into: epidermis, dermis, and subcutaneous tissue.

　　1. Epidermis

　　Definition: The epidermis is the outermost skin, covering the whole body, and has a protective effect. The epidermis has no blood vessels, it will not bleed after scratching, and it is rich in nerve endings, which can help us perceive things in the external environment.

　　Metabolism: Each layer of the epidermis is actually formed by cells in different stages of the keratinization process. The basal cells of the basal layer are the source of life for the epidermis. It continuously produces new cells and gradually moves toward the surface of the skin to become various The layer cells eventually become dead cells and fall off in the form of dander. They are produced from a basal cell and finally become dander and fall off for about 28 days.

　　2. The dermis

　　Composition: It is composed of the pedicle tissue located in the lower layer of the epidermis and the matrix in between.

　　3. Subcutaneous tissue

　　Composition: Located under the dermis, it is composed of a large number of fat cells and a small amount of pedicle tissue.

　　Function: heat preservation and cold protection, store energy, buffer external force, and protect internal tissues.

　　4. The appendages of the skin

　　Including: sebaceous glands, sweat glands, hair, nails.

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Do you know your skin? Skin type and structure.

Konnie.H

Winnie

ADA YI