How many layers does the skin consist of?

The skin consists of three primary layers: the epidermis, dermis, and hypodermis (subcutaneous layer). When referencing the number of layers within the epidermis specifically, it is typically noted that it has five distinct layers: the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale.

The choice indicating eight layers may cause confusion, but it could represent a mix of the total layers combined with the detailed subdivisions often discussed in advanced dermatological study or various classifications within specific regions of the skin (such as the presence of specific structures). However, the standard and widely accepted model for the adult human skin identifies it as forming primarily through those three acknowledged layers rather than a higher number.

Understanding the basic structure of the skin is essential for estheticians because each layer plays a crucial role in the overall functionality of the skin, including protection, regulation, and sensation.