What is the outermost layer of the skin referred to as?

The outermost layer of the skin is referred to as the epidermis. This layer serves as the body's first line of defense against environmental factors such as bacteria, chemicals, and physical abrasions. The epidermis is composed mainly of keratinocytes, which produce keratin—a protein that helps protect the skin. It is also the layer where dead skin cells continually shed and are replaced by new cells from deeper layers.

Understanding the structure of the skin is essential for nail technicians as it directly relates to proper nail care and the health of the skin surrounding the nails. Knowledge of the epidermis allows professionals to recognize skin conditions, properly sanitize, and take appropriate measures when performing nail services to protect the client's skin health.