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1 sty 2023 · Rete ridges (RRs) are distinct undulating microstructures at the junction of the dermis and epidermis in the skin of humans and certain animals. This structure is essential for enhancing the mechanical characteristics of skin and preserving homeostasis.
- Rete Ridges
Rete ridges (RRs) are distinct undulating microstructures at...
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Skin is composed of two typical layers of dermis and...
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- Rete Ridges
1 sty 2023 · Rete ridges (RRs) are distinct undulating microstructures at the junction of the dermis and epidermis in the skin of humans and certain animals. This structure is essential for enhancing the mechanical characteristics of skin and preserving homeostasis.
The epidermis forms an undulating appearance, with intermittent regular protrusions of the epidermis layer (rete ridges or pegs) into the upper layers of the underlying dermis. In some areas of the body such as the palms and soles, the rete pegs are less pronounced.
Rete ridges surround the dermal papillae, which can be seen as small extensions protruding from the papillary dermis within the epidermis. These two structures are perfectly embedded; the alternation of a rete ridge with a dermal papilla creates a characteristic repetitive and wave-shaped pattern.
During human skin development, specific interactions between epidermal and dermal cell lineages give rise to fully functional skin that contains specialized appendages, including hair follicles, sweat glands, and rete ridges.
Note the rete ridges that are down growths of the epidermis into the dermal layer. These generate a stronger connection between the epidermis and dermis and help the skin resist shearing forces. In between rete ridges are dermal papilla, which contain sensory receptors called Meissner’s Corpuscles.
18 gru 2020 · The boundary between the dermis and the overlying epidermis is characterized by upward projections of the dermis called dermal papillae and downward projections of the epidermis called epidermal ridges or rete pegs (see Fig. 7.4).The interdigitation of the dermal papillae and the epidermal ridges increases the surface area between these two ...
