- The skin is the boundary that separates the muscle tissue from the external medium that surrounds the human being, as it covers the human body externally, and we cannot imagine the appearance of the human being without having a skin. 🔴There are many jobs that a person can perform, including: 📍 The skin acts as a barrier that prevents the entry of any chemical substance into the human skin, in addition to preventing bacteria from entering the inner part of the body. 📍 It also has the ability to protect internal tissues from exposure to, and damage to, ultraviolet rays, by secreting melanin. 📍 It also has a major role in maintaining the internal body temperature at its normal rate, and this degree is maintained through the secretion of sweat when the body is exposed to high temperatures. 📍 When exposed to low temperatures, it narrows blood vessels, which results in reducing blood flow in the surface of the body, which leads to a decrease in body temperature. 📍 It is also primarily responsible for human touch, as it has many sensory receptors. 📍 It also contains nerve endings whose function is to feel pressure and pain.
- 📍 It also works to protect the human body from exposure to infection, through a number of special cells that are found inside it, which play the role of the immune system. 📍 It has a significant role in reducing the incidence of human cancerous tumors, as it works to give the body vitamin D through sunlight 🔴Layers of human skin: The skin consists of three layers, two main layers (epidermis and dermis) and both serve a specific purpose. Beneath the two layers is a layer of fat, the third layer (the subcutaneous layer) that protects your body and helps you adapt to external temperatures. _ Epidermal layer: The epidermis is the top layer of your skin. It is the only layer visible to the eyes. In fact, the epidermis is thicker and has five sub-layers. Your skin constantly sheds dead skin cells from the upper layer and replaces them with new healthy cells that grow in the lower layers and are home to your pores, which allow oil and sweat to escape. _ Dermis layer: The dermis is thicker than the epidermis and contains all the sweat and oil glands, hair follicles, connective tissues, nerve endings, and vessels. While the epidermis covers your body with a visible layer, the dermis is the layer of skin that provides the pathogen protection function your body needs. Since the dermis contains collagen, it also helps support the structure of the skin that we see _Subcutaneous layer: The layer of skin just below the dermis is sometimes called the subcutaneous fat or the stratum corneum. This layer provides insulation for your body, keeping you warm, and providing a shock-absorbing cushion that surrounds your vital organs. There are a lot of blood vessels in the hypodermis. This is the layer that connects your skin to the muscles and tissue underneath. This layer can be thicker in some parts of the body.
- 🔴How many layers of skin?! In fact, we have three basic layers, but according to a more accurate scientific classification, there are seven layers of the skin, and each layer performs different functions, starting from the upper layer, the epidermis, which is divided into five layers, all the way to the lower layer. _ The epidermis is divided into the following layers: stratum corneum. The net or virtual layer. granular layer. squamous layer; basal layer. dermis layer subcutaneous layer 🔴What are the functions of the layers of the skin? The skin performs various functions, including: 1. stratum corneum: This is the top layer of the skin and is made up of creatine. The thickness of this layer varies greatly in different areas of the body when compared to other layers. This layer plays the first line of defense against external factors 2. The net layer: This thin, transparent layer is only present in the thicker skin (like the bottom of the feet). 3. Granular layer: The chemicals secreted into this layer keep the skin cells attached to each other. 4. Squamous layer: Also known as the squamous cell layer, this layer contains dendritic cells and is the first line of defense for the skin 5. Basal layer: This is the deepest layer of the epidermis. The cells in this layer constantly produce keratinocytes, which play an important role in the formation of vitamin D. With exposure to sunlight, keratinocytes also produce protein, creatine and lipids. These act as a protective barrier for the skin. This layer also contains melanocytes, where the cells produce melanin, a natural pigment responsible for the color of the skin. 6. Function of the dermis layer: The dermis is attached to the epidermis and consists of collagen, which gives the skin its elasticity and strength. It also houses the sweat glands, sebaceous glands, hair follicles, muscles, nerve endings, and blood vessels 7. Function of the subcutaneous layer (hygroma): It is the deepest layer of the skin located under the dermis, also called the subcutaneous fascia or the subcutaneous layer, as it contains fat, as the presence of fat helps isolate the body from heat and cold and acts as an energy storage area.
- We must moisturize the skin and protect it from drying out, and this also helps in maintaining the freshness of the skin. And nourishing the skin with collagen, which is one of the essential ingredients for strong and healthy skin. Collagen is also available in the form of pills that can be eaten.
What Are The Layers Of The Skin And What Are Their Functions
The skin is the largest of the organs that God created for man, and the skin represents the first line of defense for man, as it covers the body externally and also protects the body from external damages that may affect it.
