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In humans with non-injured tissues, the tissue naturally regenerates over time; by default, new available cells replace expended cells. For example, the body regenerates a full bone within ten years, while non-injured skin tissue is regenerated within two weeks. [2] With injured tissue, the body usually has a different response.
Dermal fibroblasts are cells within the dermis layer of skin which are responsible for generating connective tissue and allowing the skin to recover from injury. [1] Using organelles (particularly the rough endoplasmic reticulum), dermal fibroblasts generate and maintain the connective tissue which unites separate cell layers. [2]
[5] [better source needed] The average human skin cell is about 30 μm in diameter, but there are variants. A skin cell usually ranges from 25 to 40 μm 2, depending on a variety of factors. Skin is composed of three primary layers: the epidermis, the dermis and the hypodermis. [4]
The cells underneath this cap then begin to rapidly divide and form a cone shaped end to the amputation known as a blastema. Included in the blastema are skin, muscle, and cartilage cells that de-differentiate and become similar to stem cells in that they can become multiple types of cells.
The formula includes lipo-hdydroxy acid — LHAs — which gently renews the skin cell-by-cell to lead to surface exfoliation that unveils brighter skin with fewer wrinkles and age spots.
After birth these outermost cells are replaced by new cells from the stratum granulosum and throughout life they are shed at a rate of 30 - 90 milligrams of skin flakes every hour, or 0.720 - 2.16 grams per day. [21] Epidermal development is a product of several growth factors, two of which are: [20]
For some animal tissues, such as mammalian skin, it is clear that the growth of the skin is ultimately determined by the size of the body whose surface area the skin covers. This suggests that cell proliferation in skin stem cells within the basal layer is likely to be mechanically controlled to ensure that the skin covers the surface of the ...
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