Which layer lies underneath the papillary dermis?

The layer that lies underneath the papillary dermis is indeed the reticular dermis. The papillary dermis is the outermost portion of the dermis, characterized by its thin structure and the presence of dermal papillae that enhance the surface area for exchange with the epidermis.

Beneath this layer, the reticular dermis provides a thicker, more fibrous network composed predominantly of dense irregular connective tissue, collagen, and elastin fibers. This structure offers strength and elasticity to the skin, helping to support the overall integrity of the dermis.

Understanding the anatomy of these layers is crucial in nursing practice, particularly in the context of burn assessments and treatments, as damage to different layers can affect healing and therapeutic approaches. The other layers mentioned, such as the epidermis (which is the outermost layer of skin), dermal papillae (which are extensions of the papillary dermis), and hypodermis (subcutaneous layer), do not lie directly underneath the papillary dermis.