Search results
Results from the WOW.Com Content Network
The stratum compactum is the comparatively deeper, more compacted and more cohesive part of the stratum corneum. [6] The corneocytes of the stratum disjunctum are larger, more rigid and more hydrophobic than those of the stratum compactum. [7] Research on osmotic permeability suggests the stratum compactum consists of two layers. The stratum ...
The lipids ultimately form the lamellar lipid bilayer that surrounds corneocytes and also contributes to the permeability barrier homeostasis of the stratum corneum. [12] The homeostasis function is regulated by the calcium gradient in the epidermis. [17] Usually the calcium level is very low in stratum corneum, but high in stratum granulosum.
Schematic illustration of the layers found in keratinized oral mucosa that include a deeper lamina propria and basement membrane in-between and superficial layers of strafied squamous epithelium that include from deepest to most superficial: 1: Stratum basale 2: Stratum spinosum 3: Stratum granulosum 4: Stratum corneum
Keratohyalin is a protein structure found in cytoplasmic granules of the keratinocytes in the stratum granulosum of the epidermis.Keratohyalin granules (KHG) mainly consist of keratin, profilaggrin, [1] loricrin [2] and trichohyalin proteins which contribute to cornification or keratinization, the process of the formation of epidermal cornified cell envelope.
Beta-keratin (β-keratin) is a member of a structural protein family found in the epidermis of reptiles and birds. [1] [2] Beta-keratins were named so because they are components of epidermal stratum corneum rich in stacked beta sheets, in contrast to alpha-keratins, intermediate-filament proteins also found in stratum corneum and rich in alpha helices. [3]
The ability of the skin to hold water is primarily due to the stratum corneum and is critical for maintaining healthy skin. [24] Skin hydration is quantified using corneometry. [25] Lipids arranged through a gradient and in an organized manner between the cells of the stratum corneum form a barrier to transepidermal water loss. [26] [27]
Scale forms on the skin surface in various disease settings, and is the result of abnormal desquamation. In pathologic desquamation, such as that seen in X-linked ichthyosis, the stratum corneum becomes thicker (hyperkeratosis), imparting a "dry" or scaly appearance to the skin, and instead of detaching as single cells, corneocytes are shed in clusters, which forms visible scales. [2]
Stratum corneum; Stratum lucidum; Stratum granulosum; Stratum spinosum; Stratum basale (also called "stratum germinativum") Blood capillaries are found beneath the epidermis and are linked to an arteriole and a venule. Arterial shunt vessels may bypass the network in ears, the nose and fingertips.