How many layers of skin does a human have?

Skin layers. The skin functions as a protective barrier that interfaces with a sometimes-hostile environment. It is also very involved in maintaining the proper temperature for the body to function well. It gathers sensory information from the environment, and plays an active role in the immune system protecting us from disease. The three layers are epidermis, dermis and hypodermis.
Skin Layers. Skin typically has 2 layers. The epidermis is the top, outermost layer (the part that you see) and the dermis is the deeper layer that contains the roots of hair, glands and blood vessels (veins and arteries.).