What is the graining layer of skin with cells that look like small distinct granules called?

The graining layer of skin characterized by cells that appear as small distinct granules is known as the stratum granulosum. This layer plays a crucial role in the process of keratinization, where cells begin to lose their nuclei and organelles and fill with keratin, a protein that strengthens the skin and makes it more protective. The granules observed in this layer are keratohyalin granules, which contribute to this transformation and help in water retention within the skin. This layer is typically found between the stratum lucidum (in thick skin) or stratum spinosum and the outermost layer, the stratum corneum, where the skin is ultimately shed. Understanding the functions and characteristics of the stratum granulosum is essential for nail technicians, as it influences skin health and aesthetics in the context of nail care and overall skin treatment.