keratosyyttien

Keratosyyttien is a Finnish term referring to keratinocytes, which are the primary type of cell found in the epidermis, the outermost layer of the skin. These cells originate in the basal layer of the epidermis and undergo a process of differentiation as they move towards the surface. During this process, they produce keratin, a tough, fibrous protein that is the main structural component of skin, hair, and nails.

As keratinocytes mature and move outward, they flatten and eventually die, forming the stratum corneum, the protective outermost layer of the skin. This layer acts as a barrier against physical damage, pathogens, and water loss. The continuous shedding and renewal of these keratinized cells is a vital aspect of skin health and repair.

The proliferation and differentiation of keratinocytes are tightly regulated processes. Disruptions in these processes can lead to various skin conditions, including psoriasis, where there is an overproduction of keratinocytes, and certain types of skin cancer. Understanding the biology of keratinocytes is fundamental to dermatology and the treatment of skin disorders. They play a crucial role in maintaining the integrity and function of the skin.