ECPI Anatomy and Physiology Exam 1 Practice Test 2026 – Complete Prep Guide

The layer beneath the dermis that stores fat is the subcutaneous layer, also called the hypodermis. This region is rich in adipose tissue, which serves as an energy reserve and provides insulation to reduce heat loss. It also cushions deeper tissues and helps anchor the skin to underlying structures. So, fat storage under the dermis occurs in the subcutaneous (hypodermal) layer.