What is the function of several layers of skin? The quality of skin is very important to us. Although each of us has different skin types, the skin structure is the same. Ordinary people's skin consists of epidermis, dermis and subcutaneous tissue, so the protection of stratum corneum is very important. Here are several layers of skin.
What is the function of several layers of skin? 1 epidermis
Epidermal layer is stratum corneum, transparent layer, granular layer, spinous layer and basal layer from outside to inside.
1, stratum corneum: the outermost tissue of epidermis. It acts as a protective layer for the skin. When the stratum corneum becomes thinner, the skin is prone to problems such as sensitivity, allergy and red blood spots. Therefore, we should choose mild cleaning products to clean the skin during daily skin care, so as to protect the health of the stratum corneum and avoid the damage of excessive cleaning to the skin health.
2. Transparent layer: The transparent layer, also known as the transition layer, is commonly found in the thick skin of hands and feet. It has the functions of protecting skin, buffering and reducing friction, and at the same time, it has the function of barrier to prevent water loss and electrolyte from passing through.
3. Granular layer: Granular layer plays a role in skin regeneration, mainly in the renewal of epidermis. The granular layer can block ultraviolet rays and carry out normal metabolism. The granular layer is like a mirror, and ultraviolet rays can be refracted when they come in. The granular layer can be used for washing water, milk, etc. In hand washing and skin care products.
4. Spinal layer: The spinal layer can absorb nutrients and can be repaired and regenerated. Has the function of synthesizing collagen.
5. Basal layer: As the lowest layer of the skin, the basal layer has the functions of heat preservation, cold prevention and buffering, and can also protect the internal tissues of the skin.
What is the function of several layers of skin? 2 How many layers does the skin have?
Each layer is the first layer, which can resist the invasion of foreign bacteria and protect the skin. The stratum corneum is the second layer, which is a natural barrier and is also responsible for moisturizing. Granular layer is the third layer that absorbs moisture and keeps skin moist. Spiny layer is the fourth layer to promote metabolism. The basal layer is the last layer, which closely connects the epidermis and dermis.
What is the function of each layer of skin?
1. Basal layer: Located in the deepest layer of epidermis, it is connected with deep dermis through basement membrane. The basal layer is a short columnar epithelial cell. The cells are small, arranged neatly, and the nucleus is oval. Melanin particles usually exist in cytoplasm. There are melanocytes between short columnar epithelial cells. Melanocytes are slightly round, with dendritic processes and small nuclei.
Can produce melanin particles. The number of melanin particles is related to the depth of skin color. Melanin particles can absorb ultraviolet rays and protect deep tissues from ultraviolet radiation. Cell division in the basal layer is more active, constantly producing new cells and moving to the surface layer to supplement aging and exfoliated keratinocytes.
2. Spine layer: Located on the shallow surface of basal layer, it is composed of 4- 10 polygonal cells with large cells, many spinous processes and round nuclei.
3. Granular layer: located on the surface of spinous layer, composed of 2-3 layers of spindle cells. There are hyaline keratin particles of different sizes in the cytoplasm. Ordinary staining is strongly basophilic, with small nucleus and shallow staining.
4. Transparent layer: Located on the superficial surface of granular layer, it consists of 2-3 layers of flat cells without nucleus. Cytoplasm contains eosinophilic hyaluronan, which is denatured by hyaluronan granules in granular layer cells.
5. stratum corneum: located in the shallowest layer of epidermis, it consists of several to dozens of layers of flat seedless keratinocytes, and its cytoplasm is full of eosinophilic keratin, which has strong resistance to factors such as acid, alkali and friction. The surface cells of the stratum corneum often fall off in small pieces to form dander.
How to self-test skin
Gadgets: clean paper towels or oil-absorbing paper.
Method: When you wake up in the morning, it is best to apply it to your face immediately and press it, then take it off.
1, oily skin. Paper towels are transparent in many places, which proves that your skin type is oily skin. Many people, especially adolescents, have oily skin. This type of person, with large pores and oily skin, looks particularly shiny, so it is easy to grow spots, acne and blackheads, and looks bloated, so cleaning the skin is the most important step in beauty and skin care.
2, dry skin. The facial tissue is clean and the face feels tight, so you can judge that your skin type is dry skin. In fact, insufficient oil will make the skin fragile and peeling, which will not play a good protective role.
Experts remind everyone that you can clean your skin with mild facial cleanser at this time, and use night cream and essence to replenish water before going to bed. Therefore, such skin is prone to wrinkles and fine lines, and special attention should be paid to cleaning skin and beauty care.
3, neutral skin. There is only a small amount of oil in the T-shaped area (forehead, nose, chin) of facial tissue, so you can judge that your skin type belongs to neutral skin. In fact, this is the ideal skin, with good water-oil balance, elastic, smooth, clean and healthy appearance. However, everyone should take good measures to protect the skin when cleaning.
4, mixed skin. Only the forehead, nose and chin on the paper towel are seriously oily, so you can judge that your skin belongs to mixed skin. In fact, this kind of skin is difficult to adjust. After cleaning the skin every day, use astringent water to reduce the generation of grease and dead skin in the T-shaped area, and then apply oil control cream on the whole face, especially on the dry skin area. As long as you stick to it every day, you can achieve the effect of beautifying your skin.
What to eat is good for the skin?
1. Collagen contained in trotters can prevent premature skin aging and promote the growth of human fur. Its nutritional value is very high. Fruit is rich in vitamins. Eating more fruits can help detoxify the skin, interfere with melanin production and help eliminate dullness on the skin.
2. Soymilk is rich in vitamins. Drinking soybean milk every day can increase the smoothness of skin and improve scars. Red beans can not only expel edema, but also nourish blood and promote qi circulation, so that you can have a rosy apple face even if you don't blush. These foods are good for your skin.
What is the function of several layers of skin? It is recommended to adhere to these five good habits every day, and the skin is fair and shiny.
First of all, develop good habits of work and rest.
You know, people nowadays like to stay up late. Few people can sleep before 1 1 at night! Staying up late will not only affect the secretion of melatonin and lead to dull complexion, but also bring a series of problems such as acne and dark circles.
"Beauty sleep" is not just talk. Going to bed early and getting up early is a good way to beautify and whiten!
Therefore, if you want to keep your skin healthy, you should start with a healthy routine. 22: 00 -05: 00 in the evening is the prime time for skin repair, so we should have a regular schedule, go to bed early and get up early. The benefits it brings are incomparable to any skin care products and medical beauty means. Let your body fix the biological clock of metabolism, excrete hepatotoxicity in time, and not give opportunities for dark circles, spots and dark yellow, which can not only effectively relieve the pressure of life, but also make the skin moist and elastic.
Second, the diet is light, reducing sugar intake.
Why insist on using sunscreen to brighten skin care products, but it can't be white?
Then the sisters should check whether there are drinks, milk tea, cakes and high-sugar fruits.
Sugar is an essential substance for our human body. Without sugar, it will have an impact on our body. However, too much sugar intake is not good for our health, and it will also make our skin dull, slack and aging, which is the saccharification reaction.
Simply put, sugar combines with protein in our body to produce an end product of glycosylation, which will affect our collagen, making it lose elasticity, brittle and hard, so it will produce wrinkles, dark yellow skin, rough skin, acne and so on.
So we need anti-saccharification. Anti-saccharification is not to completely avoid contact with sugar, but to control and reduce sugar intake.
For example, if you don't eat foods with high sugar content, such as milk tea and fruits with high sugar content, and don't drink milk tea to save money, you can not only save money, but also make your skin better and healthier.
Third, exfoliate regularly.
Many people will ignore a problem, that is, exfoliation. If the stratum corneum is too thick, it will lead to the blockage of skin pores. Generally speaking, cutin is similar to dead skin.
As long as you exfoliate regularly, say once every two weeks, you can make your skin whiter. Because the stratum corneum is thick, it will not only appear dull, but also hinder the skin from absorbing the ingredients in skin care products.
Fourth, moderate exercise.
Exercise and fitness are our best skin care products, and our skin condition will get better and better if we keep exercising.
Exercise accelerates our body's metabolism and makes our skin more shiny. Moreover, dopamine will be secreted during exercise to eliminate anxiety, and the whole person will be more confident after fitness. Sisters also look at those female stars who insist on exercising. Their skin condition and temperament are very different. Even if they are not female stars, people who insist on exercising every day will give people a positive and optimistic feeling.
It can be seen that exercise is not only good for your skin, but also makes you exude a healthy and confident state from the inside out, making your temperament more outstanding.
Fifth, pay attention to face cleaning before going to bed.
Washing your face is a relatively basic thing in all skin care work. After the previous makeup removal work is completed, you should clean your face with facial cleanser, but this seemingly simple thing, many girls have not done it.
The correct way to wash your face should be to wait until the facial cleanser is fully foamed, then apply it to every corner of your face, chin, forehead and clean every corner of your cheeks.
Many girls are prone to acne in these parts, and most of the reasons come from the lack of daily washing and cleaning.