Papillary body

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Scheme of the human skin: "dermal papilla" refers to the papillary body.

The papillary body is the term used to describe finger-shaped invaginations ("papillae") on the underside of multilayered epithelia that extend from the layer below. A papillary body occurs at points of strong mechanical stress and serves the intensive, zipper-like interlocking of the epithelium with its base. The depressions in the epithelium between the papillae are called epithelial or rete cones .

On the outer skin , the papillary body is formed by the dermis and occurs here as a papillary layer ( stratum papillare ). Only the furrows of the field skin are papilla-free. The papillary body is most strongly developed on the hoof in horses. Here it forms branched leaves in the wall area.

The papillary body is formed on the mucous membranes by its own layer ( lamina propria mucosae ). Only keratinized mucous membranes such as the oral mucous membrane as well as the mucous membrane of the anus , the vaginal vestibule , the glans , the esophagus and the stomach of the ruminants ( rumen , reticulum , leaf stomach ) have a papillary body .

literature

  • T. Nasemann, W. Sauerbrey: Textbook of skin diseases and venereal infections for students and doctors . Springer, Berlin 2013, ISBN 978-3-662-08298-0 , pp. 15 .
  • Hans-Georg Liebich: Functional histology of domestic mammals: textbook and color atlas for study and practice . Schattauer, Stuttgart 2004, ISBN 978-3-7945-2311-5 , pp. 52 .