Utah Esthetician State Board Practice Exam 2025 - Free Esthetician Practice Questions and Study Guide

The hypodermis, also known as the subcutaneous layer, is primarily composed of adipose tissue. This layer is situated beneath the dermis and serves several essential functions. One of its primary roles is to provide insulation to help regulate body temperature and to serve as an energy reserve. Additionally, the adipose tissue in the hypodermis acts as a cushion to protect underlying structures and organs from external trauma.

The dermis, while important for its structural support and containing connective tissue, blood vessels, and hair follicles, does not primarily consist of adipose tissue. The epidermis, particularly the stratum corneum, is composed mainly of keratinized cells and lacks adipose tissue, focusing instead on protection and barrier functions. Thus, recognizing the structure and role of each skin layer helps clarify why the hypodermis is the correct answer regarding its primary content of adipose tissue.