What is the second layer of skin beneath the papillary layer called?

The second layer of skin beneath the papillary layer is called the reticular layer, which is part of the dermis. The dermis itself is divided into two main layers: the upper papillary layer and the deeper reticular layer. The reticular layer is thicker and more fibrous than the papillary layer, composed mainly of dense irregular connective tissue that provides strength, elasticity, and resilience to the skin. It contains a rich supply of blood vessels, nerve endings, and various structures, including hair follicles, sebaceous glands, and sweat glands.

Understanding the structure of the skin helps in esthetics practice, as it reveals how different skin layers interact and how treatments might affect them. While the terms dermis and corium are related to the skin's structure, the reticular layer specifically refers to the deeper part of the dermis beneath the more superficial papillary layer, making it the most accurate choice for this question.