Rete pegs (also known as rete processes or rete ridges) are the epithelial extensions that project into the underlying connective tissue in both
skin
Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation.
Other animal coverings, such as the arthropod exoskeleton, have different de ...
and
mucous membrane
A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue. It i ...
s.
In the epithelium of the mouth, the
attached gingiva exhibit rete pegs, while the
sulcular[Itoiz, ME; Carranza, FA: The Gingiva. In Newman, MG; Takei, HH; Carranza, FA; editors: ''Carranza’s Clinical Periodontology'', 9th Edition. Philadelphia: W.B. Saunders Company, 2002. pages 23.] and
junctional epithelia do not.
[Page, RC; Schroeder, HE. "Pathogenesis of Inflammatory Periodontal Disease: A Summary of Current Work." ''Lab Invest'' 1976;34(3):235-249] Scar tissue
Scar tissue may refer to:
Medicine
* Scar, an area of fibrous tissue that replaces normal skin after injury
* Granulation tissue, a product of healing in major wounds
Film and television
* ''Scar Tissue'' (1975 film), or ''Wanted: Babysitter'' ...
lacks rete pegs and scars tend to shear off more easily than normal tissue as a result.
Also known as ''papillae'', they are downward thickenings of the
epidermis between the
dermal papillae
The dermis or corium is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain. It is divided in ...
.
References
{{Reflist
Dermatology