Was ist eine Basalzellschicht?
Die unterste Schicht der Epidermis ist die Basalzellschicht (Stratum basale = besteht aus einer Schicht, die Zellen sind würfelförmig). Hier erfolgt die Zellteilung und Neubildung der Zellen. Von hier aus wandern die Zellen langsam durch weitere Schichten in Richtung Hautoberfläche.
Was hat die Oberhaut für eine Aufgabe?
Die Epidermis-Funktion liegt in dem Schutz des Organismus vor schädigenden äußeren Einflüssen. Als oberste Hautschicht verhindert die Epidermis das Eindringen schädlicher Mikroorganismen und schützt vor UV-Strahlung und mechanischer Belastung.
What is the function of the stratum corneum?
As the outermost layer of the epidermis, the stratum corneum is the first line of defense for the body, serving an essential role as a protective skin barrier against the external environment.
How thick is the stratum corneum in reptiles?
Generally, the stratum corneum is made up of 15-20 dead cell layers with a thickness of 10-40 micrometer. The stratum corneum is permanent in reptiles and is only replaced during the phase of rapid growth called molting or ecdysis. Beta-keratin is also present and provides rigidity to the skin layer.
How are keratinocytes shed from the stratum corneum?
The cells are also shed from the surface of stratum corneum through the process called desquamation, which balances the keratinocytes that proliferate and form in the basal layer of the epidermis. These cells migrate toward the surface through the epidermis.
What are the symptoms of abnormal parakeratosis of the stratum corneum?
Abnormal parakeratosis of the stratum corneum can appear in patients with psoriasis, chronic eczema, and squamous cell carcinoma. Scaling, or visible peeling and flaking of the skin, furthermore is a salient manifestation of diseases of the stratum corneum. Copyright © 2021, StatPearls Publishing LLC.
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