8-13.Wrinkle and Erastin
	Source Erastin of expansion and contraction ●In dermis, the elastoma besides the collagen of glue field fiber exists, too. The principal ingredient of elasticity fiber is Erastin. It is in the part that corresponds to the intersection of the reticulation of collagen fiber that does the reticulation structure, elasticity is abundant as its name suggests, and sources of the power of expansion and contraction. A large amount of Erastin exists in the internal organs related to expansion and contraction in Tsne in the human body. A lot of Erastin is contained on the aorta wall that follows like the ligament and the blood, etc. that expand and contract according to the movement of the frame and the muscle and expands and contracts.
	Degeneration of Erastin that fixes wrinkle ●The amount of Erastin included in the corium is less than that of the ligament and the aorta wall, and the working is more important. If Erastin doesn't exist, the restoration power of the skin after outward pressures are excluded becomes the remarkably inferior one. Erastin is shape that regularly curls and coils around collagen fiber. However, it is finished that the curl expands by aging and decreases the elasticity of the skin by ahead becoming a straight line, and dividing in detail by aging.
	The degeneration of Erastin might not only decrease normal elasticity but also produces unnecessary elasticity. In a word, the wrinkle might be fixed. Even if the wrinkle is enlarged, it enters in Ke food in the direction of the right angle, and it regrets and it enters the state. Especially, when a lot of ultraviolet rays is bathed in, it is deeply carved. Erastin has increased excessively compared with the skin that doesn't hit ultraviolet rays in such a part. Elasticity doesn't arise though Erastin increased because unnecessary elasticity fiber can be done. It is and because the working works quite oppositely. It will pull it in the direction where the wrinkle and slack are made deeper.
	It is at the intersection of the reticulation of collagen fiber, and Erastin supports collagen mutually like the spring, and does working that keeps the elasticity of the skin.