Pathological changes of the organization, mainly the epidermal cuticle significant parakeratosis, acanthosis cell layer thickening, epidermal sudden downward extension of in-depth dermis.

本型组织病理改变，主要是表皮角质层有显著角化不全，棘细胞层增厚，表皮突向下延展，深入真皮。

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Collagens are a group of proteins in the dermis, the connective tissue layer of the skin, and are responsible for the strength of skin.

胶原是真皮里的一组蛋白，是皮肤的结缔组织层，并形成了皮肤的韧性。

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The epidermis is bonded to a deeper skin layer below known as the dermis, which gives the organ its strength and elasticity thanks to fibers of collagen and elastin.

表皮与它下面的一层真皮连在一起。真皮由于含有纤维、胶原质和弹性蛋白而具有力量和弹性。

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He then wants to take moulded sheets of artificial skin to build up the intermediate layer, the dermis, before adding the outer epithelium graft employing new approaches that lift thin, 20-cell-thick slices from elsewhere on the body.

BBC: US Army seeks new ways to treat facial skin injuries

Mongolian spots (technically named congenital dermal melanocytosis) are flat bluish-green, gray or light brown areas where cells called melanocytes have been trapped in a layer of the skin called the dermis.

CNN: What are Mongolian spots?

In ablative (wounding) laser resurfacing, a laser beam destroys the outer layer of skin (epidermis) and heats the underlying skin (dermis), which stimulates the growth of new collagen fibers.

CNN: Wrinkles