Dermis
Dermis — the thick middle layer of skin that sits beneath the epidermis and above the hypodermis, providing structural strength, elasticity, and nourishment. It houses collagen and elastin fibers, blood vessels, nerve endings, hair follicles, and sweat and oil glands within a supportive extracellular matrix.
Key points
- The dermis is far thicker than the outer epidermis and gives skin its firmness, resilience, and ability to stretch and recover.
- It is commonly divided into the upper papillary layer and the deeper reticular layer, which contains the densest collagen network.
- Fibroblasts within the dermis produce collagen, elastin, and glycosaminoglycans that maintain skin structure and hydration.
- Blood vessels in the dermis supply nutrients and help regulate body temperature, while nerve endings enable touch, pressure, and temperature sensation.
Frequently asked
What is the difference between the dermis and the epidermis?
The epidermis is the thin outer barrier layer you can see and touch, while the dermis is the deeper layer that provides structural support, blood supply, and the collagen and elastin that keep skin firm.
Can skincare products reach the dermis?
Most topical products act mainly on the epidermis and skin surface, as the barrier limits how deeply ingredients penetrate, though some actives can influence dermal processes indirectly over time.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
