Histological analysis of wound treatments (10X).

Wounds stained with H&E staining treated with PRP gel (GII), gel supplemented with collagen nanoparticles (GIII), and saline as negative control (Saline) (GI) on the 10th day. Epi: Epidermis; K: Keratin layer; BV: Blood vessels; HF: Hair follicles; SG: Sebaceous glands; U: Ulcer; C: Collagen; Connective tissue (CT) a and b are the images with 10x and 20x magnification.