granuloosikerros

The granuloosikerros, also known as the granular layer, is a stratum of cells found in the epidermis. It is situated between the stratum spinosum and the stratum corneum. This layer is characterized by the presence of keratohyalin granules within the keratinocytes. These granules contain proteins that are essential for the formation of the stratum corneum and the subsequent development of a protective barrier in the skin.

The cells of the granuloosikerros are flattened and undergo a process of keratinization. As the cells move upwards through the epidermis, they accumulate these characteristic granules. This process is crucial for the eventual shedding of the outermost skin cells and the continuous renewal of the epidermal barrier. The granuloosikerros plays a vital role in maintaining skin integrity and preventing water loss from the body. Its presence is a key indicator of a healthy and functional epidermis.