Britannica
Sources used in this answer
How does the dermis nourish the epidermis?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
human body
Vintage anatomy charts of the human body showing the skeletal and muscle systems.
The dermis plays a vital role in supporting the epidermis, which lacks its own direct blood supply. Because no blood vessels penetrate the living epidermis, it relies entirely on the underlying dermis for its metabolic needs.12
The dermis is richly supplied with a network of blood and lymph vessels. Through this vascular system, the dermis provides nourishment to the overlying epidermis via diffusion. This process allows essential nutrients and materials to pass from the dermal layer into the living basal cells of the epidermis, sustaining the tissue.1342