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FOR AGES 3 YEARS TO 18 YEARS
Normal skin senses sensations, relaying information to your brain about what is going on around you.
Human skin acts as a barrier between the vital organs, muscles, tissues, and skeletal system of your body and the outside environment. Bacteria, shifting temperatures, and chemical exposure are all kept out by this barrier.
The largest external organ of your body is your skin. Your skin is the primary organ for your sensation of touch, working in tandem with your neurological system. The skin is special in that it is capable of reacting to the active metabolite of vitamin D sources inthe body.
The skin's epidermis is a stratified squamous epithelium that is continually regenerating. It is comprised of keratinocytes, but it also contains Langerhans cells, melanocytes, and Merkel cells, all of which are supported by a dermis that contains the nerve and circulatory networks that supply the epidermis. A cornified stratified squamous epithelium makes up the epidermis. It is mostly made up of keratinocytes that multiply in the epithelium's basal layer before exiting to the outer surface.
Skin has three layers; the epidermis, or the outermost layer of skin, determines your skin tone and serves as a waterproof barrier. It is followed by a layer of tough connective tissues, hair follicles, and sweat glands called the dermis (middle layer). Finally, there is the hypodermis (a deeper subcutaneous tissue) containing fat cells and connective tissue.
The epidermis is the body's initial line of protection against external elements, UV radiation, bacteria, and other pathogens, as well as the water-resistant outer layer of skin. It consists of four to five sublayers of tightly packed cells.
The dermis is the layer of skin that lies underneath the epidermis. The hair follicles, sweat and oil glands, and blood arteries are all housed in this layer of skin, which also contains nerve endings. The hair follicles start at the epidermis's surface.
The subcutaneous layer of the skin (under the skin) fats, connective tissues, blood vessels, and nerve cells make up the hypodermis.
The epidermis serves as protection for your body against UV radiation, pathogens (bacteria, viruses, fungi, and parasites), and chemicals by acting as a shield.
The stratum corneum (outermost layer of the epidermis) stores water and helps skin hydration and health. Keratinocytes become corneocytes in the stratum corneum (horny layer). Fats also make up this stratum corneum layer of the skin, which prevents water from quickly entering or exiting your body. The stratum spinosum aids in the flexibility and strength of your skin.
As you become older, new skin cells form at the deepest layer of your epidermis (stratum basale) and move up through the other layers. After roughly a month, they reach the epidermis' outermost layer, where skin cells are shed from body regions, and new cells grow at the bottom layer.
Melanocytes are epidermal cells that generate melanin, a pigment family that gives skin its color. The epithelium surface of the skin is the body's chemical barrier against microbial invasion.
The epidermal cells and cuticle of leaves, like the skin of human beings, offer protection and cover for plant components.
The epidermis of plants is a single layer of cells, in contrast to the several layers of cells seen in the epidermis of humans and animals. The cuticle, an impermeable material released by epidermal layers to guard against desiccation, is an extra layer on top of the plant epidermis.
The epidermis is the outermost of the two layers that make up the skin of the human body. In the human body, epidermal cells serve as a barrier, defending against germs and other particles formed while also controlling the quantity of water released.
Your skin's outer layer (epidermis) is mostly made up of dead cells on the surface. The skin's abundant blood vessels and sweat glands help to manage body temperature by regulating heat loss from the body.
The cell renewal cycle is controlled by the epidermis; dead skin cells peel off the stratum corneum. A layer of the epidermis includes dead skin cells.
Dead cells are shed on a regular basis and are gradually replaced by basal cells generated from the basal layer. Melanocytes, basal cells that create melanin, the pigment that gives skin color, are also found in the basal layer.
Your skin will darken if your body produces more melanin.
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