Which list correctly identifies the THREE main layers of the integumentary system from superficial to deep?
Explanation
From the outside in, the integumentary system has three principal layers: the EPIDERMIS (avascular, multi-layered keratinized epithelium with melanocytes), the DERMIS (vascularized connective tissue containing blood vessels, sensory nerves, sebaceous and sudoriferous glands, and hair follicles), and the SUBCUTANEOUS or HYPODERMIS layer (mainly adipose tissue plus larger vessels and nerves, providing insulation, energy storage, and cushioning). Cosmetic services act on the epidermis and at most the upper papillary dermis; cosmetologists may not legally penetrate the dermis. Options A, B, and C scramble the order in ways the exam tests directly. Scope and competence sit under Bus. & Prof. Code §7320.
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