Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

What is a characteristic of the stratum lucidum layer?

1. Found in all areas of the body

2. Only present in thick areas like palms and soles

3. Contains hair follicles

4. Composed primarily of blood vessels

The correct answer is: Only present in thick areas like palms and soles

The stratum lucidum is a specific layer of the epidermis that is not found throughout the entire body; instead, it is typically located in areas of thick skin, such as the palms of the hands and the soles of the feet. This layer serves as an additional protective barrier where skin is subject to a higher degree of abrasion and friction, contributing to the overall resilience of these areas. In thick skin, the stratum lucidum appears as a clear band and provides several functions, including enhancing the skin's ability to withstand mechanical stress. Its presence is specifically adapted to regions of heightened use, which distinguishes it from thinner, more delicate skin that can be found elsewhere on the body. The other options do not accurately describe the characteristics of the stratum lucidum. For example, it is not present in all areas of the body, nor does it accommodate hair follicles or contain a significant number of blood vessels. Instead, the cells in the stratum lucidum are primarily composed of keratinocytes, which are packed with keratin, providing structural stability and hydration. This makes its identification particularly significant in understanding skin anatomy and physiology in relation to areas of wear and tear.