Where is the subpapillary plexus located?

• A. In the subcutaneous layer
• B. In the epidermis only
• C. Along the border of the epidermis and dermis
• D. In the hair follicle

Answer: (C)

The subpapillary plexus is found in the upper dermis, just beneath the epidermal-dermal boundary, along the border where the epidermis meets the dermis. This position places capillary loops close enough to the epidermis to supply nutrients and oxygen to the avascular epidermis through diffusion, and it helps with heat transfer to the surface. It’s not located in the deeper subcutaneous layer, not within the epidermis itself, and not exclusively inside a hair follicle—hair follicles receive their blood supply from vessels in the surrounding dermis.