Papillary layer of dermis
The papillary layer is a more superficial and significantly thinner layer of the dermis. It is mainly composed of areolar connective tissue and various types of cells that include fibroblasts, scattered mast cells, macrophages, and other leukocytes. The substance of this tissue consists mainly of type I and III collagen fibers.
The papillary layer forms irregular projections known as the dermal papillae. They interlace with the epidermal ridges and contain small vessels organized in subpapillary vascular plexus. The papillae are less abundant and smaller in thin skin that has minimal mechanical stress, when compared to in areas of thicker skin (i.e., palms and soles) where they tend to form curved parallel lines.
The main function of the papillary layer is to provide the superficial dermal and epidermal layers with sufficient nutrients.
English: Papillary layer of dermis
English synonyms: Papillary dermis
Latin: Stratum papillare dermis
Latin synonyms: Corpus papillare
|Definition||Superficial layer of dermis of skin|
|Function||Nutrition and thermoregulation|
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