Dermal papillae
Dermal Papillae
Dermal papillae (pronunciation: /ˈdɜːrməl pəˈpiːliː/) are small, nipple-like extensions (or interdigitations) of the Dermis layer of the Skin that reach into the overlying Epidermis layer.
Etymology
The term 'dermal papillae' is derived from the Latin words 'derma' meaning skin and 'papilla' meaning nipple. It refers to the nipple-like projections of the dermis layer of the skin.
Function
Dermal papillae play a crucial role in the regulation of Hair follicles and are responsible for the formation of Fingerprints. They also contain Capillaries that supply nutrients to the cells of the epidermis and regulate local blood flow.
Related Terms
- Dermis: The layer of skin beneath the epidermis that contains connective tissue, hair follicles, and sweat glands.
- Epidermis: The outermost layer of the skin.
- Hair follicle: A part of the skin, which grows a hair by packing old cells together.
- Fingerprints: The unique patterns created by skin ridges found on the human fingers.
- Capillaries: The smallest of the body's blood vessels. They are only one cell thick, and they are the sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body.
External links
- Medical encyclopedia article on Dermal papillae
- Wikipedia's article - Dermal papillae
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