New Jersey Esthetics Practice Exam 2026 – Complete Test Prep

The subcutaneous layer is primarily composed of fat, also known as adipose tissue, which serves several vital functions for the body. This layer acts as an insulator, helping to regulate body temperature and prevent heat loss. Additionally, the fat stored in the subcutaneous layer provides cushioning to protect underlying structures, such as muscles and bones, from external impacts. Furthermore, it serves as an energy reservoir, as the body can utilize these fat stores for energy when needed.

In contrast, the epidermis is the outermost layer of the skin and primarily consists of keratinized cells that provide a protective barrier. The dermis, situated beneath the epidermis, contains connective tissue, hair follicles, blood vessels, and nerve endings, but it lacks the significant fat content found in the subcutaneous layer. The basal layer, which is part of the epidermis, is where new skin cells are generated but is also not composed of fat. Understanding the distinct composition and functions of these skin layers is essential for various esthetic practices, as they inform the techniques and products suited for skincare.