7-10.Fibroblast
	Fibroblast in dermis is making the collagen which is maintaining the elasticity of the skin, and erastin which is carrying out elasticity maintenance.Fibroblast keeps the balance of generation and the resolution of the hyaluronic acid, collagen, and Erastin that has a big influence on the moisture retentivity of the skin and has been renewed. As for aging, the resolution exceeds both generation tThe decline of the activity of this Fibroblast causes a decrease of collagen and Erastin, and the beam and the elasticity of the skin will be lost. hough generation is superior to the resolution at the term of growth. The number also of hyaluronic acids that have a big influence on the moisture retentivity of not only that but also the skin decreases. Moreover, because the generative capacity not only becomes weak but also the proliferation ability decreases to Fibroblast in the latter half in one's twenties, aging is accelerated.