As cells die they are pushed to the surface to replace dead cells that are shed from the ________.
Stratum Corneum
The stratum corneum is the outermost layer of the skin that acts as a protective barrier against environmental stressors, such as UV radiation, pollution, and water loss. It is composed of dead skin cells called corneocytes, which are densely packed with keratin protein fibers and lipids.
The stratum corneum plays a crucial role in maintaining skin hydration by preventing excessive water loss from the body. This layer also interacts with the outside environment, regulating the absorption and elimination of substances such as drugs and cosmetics.
The thickness of the stratum corneum varies depending on the location of the skin. For instance, it is thicker on the palms and soles of the feet compared to other parts of the body. The turnover rate of the skin cells in this layer also varies depending on factors such as age, climate, and exposure to UV radiation.
Problems with the stratum corneum, such as excessive dryness or damage, can lead to skin conditions such as eczema, psoriasis, and dermatitis. Therefore, maintaining the health of this layer through regular moisturization and avoiding harsh chemicals is essential for healthy skin.
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