What name do we give the innermost layer of hair?

The innermost layer of hair is known as the medulla. This central core of hair can vary in its presence depending on the type of hair; it is often found in thicker, coarser hair. The medulla is surrounded by the cortex, which is the middle layer responsible for the hair's strength and color, and the cuticle, the outermost layer that protects the hair shaft and gives it shine.

Understanding the layers of hair is essential in the context of waxing because each layer has different characteristics that can influence the effectiveness of hair removal methods. For instance, the presence of a medulla can impact the density and texture of the hair, which might affect how well the wax adheres during the waxing process. Therefore, recognizing the role of the medulla is significant for anyone working in the field of hair removal and cosmetics. In contrast, the follicle is a structure located beneath the skin that houses the hair root, rather than being a layer of the hair itself.