Akram El-Meligy, Mariam; Ishaq Bolis, Sara; Bahaa El-Dein, Sherine; Sameh Mahdy, Taghreed
(October University for Modern Sciences and Arts, 2019)
Wrinkles are creases, folds, or ridges in the skin. After the age of 20, the skin begins to lose over time its elasticity, firmness and collagen fibers. Accordingly, wrinkles tend to occur in the areas of muscle contraction. ...