PSI Barbering Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Subcutaneous tissues are primarily composed of adipose tissue, which is a type of connective tissue that stores fat. This layer serves several essential functions, including insulation, energy storage, and providing cushioning for underlying structures such as muscles and bones. The presence of adipose tissue helps to regulate body temperature and protects the body against external impacts.

While connective tissue is a broader term that includes various types of tissue, including adipose, muscle tissue and epithelial tissue do not primarily comprise the subcutaneous layer. Muscle tissue relates to the body's movement and contractile functions, whereas epithelial tissue forms protective layers on body surfaces and linings but does not constitute the fatty layer beneath the skin. Thus, the specificity of adipose tissue as the correct answer highlights its unique role within the subcutaneous layer, distinct from the broader categories of connective, muscle, or epithelial tissues.