Fig. 3From: The collagen enhancement by Spirulina extract in intrinsic and extrinsic skin aging in albino ratEffect of SE on the collagen fiber of the albino rat skin (Masson stain 10×).GI: control young group, GII: SE only group, GIII: UVA group, GIV: UVA + SE, GV: old untreated group and GVI: old + SE group, red arrowheads: distraction, black arrowheads: hemorrhage, arrows: wrinklesBack to article page