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dermal papilla; papillary dermis

Small interdigitations) of the dermis into the epidermis. Dermal counterpart of rete ridges. Lies above the reticular dermis. Function: - increases exchange of oxygen, nutrients, & waste products between the dermis & epidermis - nourishes hair follicles - increase surface area of contact between dermis & epidermis thus strengthens the junction betweem them Pathology: - with age dermal papillae tend to flatten Notes: - observed at the surface of the skin in hands & feet as epidermal or papillary ridges (fingerprints)

Related

rete ridge reticular dermis

General

connective tissue

References

  1. Wikipidia: Dermal papillae http://en.wikipedia.org/wiki/Dermal_papillae
  2. Medical Knowledge Self Assessment Program (MKSAP) 18, American College of Physicians, Philadelphia 2018

Component-of

dermis; corium