Jones and Bartlett EMT Course Practice Test 2025 – Comprehensive All-in-One Guide to Exam Success!

The outermost or dead layer of the skin is the stratum corneum. This layer is part of the epidermis, which is the topmost skin layer. The stratum corneum consists of dead, flattened skin cells that have become keratinized. This process provides a protective barrier for the underlying layers of skin and prevents water loss. The cells in this layer are continually shed and replaced by cells from deeper layers of the epidermis, which move up through the layers as they mature and die.

While the dermis, subcutaneous tissue, and hypodermis are important layers of the skin structure, they do not serve as the outermost layer. The dermis is located beneath the epidermis and contains blood vessels, nerves, and connective tissue. The subcutaneous tissue and hypodermis lie beneath the dermis and primarily consist of fat and connective tissue, providing insulation and cushioning.