Certified Outpatient Coder (COC) Practice Exam 2025 - Free COC Practice Questions and Study Guide

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Which layer of skin is considered the deepest layer?

Dermis

Hypodermis

The hypodermis, also known as the subcutaneous layer, is recognized as the deepest layer of skin. It serves as a critical layer lying beneath the dermis. The primary function of the hypodermis includes anchoring the skin to underlying structures such as muscles and bones, as well as acting as a cushion to absorb shock and insulate the body, maintaining thermal regulation.

In contrast, the dermis is the middle layer containing connective tissue, blood vessels, and nerve endings, which supports and nourishes the epidermis. The epidermis is the outermost layer of skin that provides a barrier to the external environment. Within the epidermis, the stratum corneum is the outermost sublayer consisting of dead skin cells that have shed off, providing additional protection.

Thus, understanding the roles and locations of each layer of skin is crucial in anatomy and physiology, cementing the hypodermis's position as the deepest layer among them.

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epidermis

Stratum corneum

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