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III-9 (5) Slide 76, Thin Skin. Medium power view. Epidermis (top), papillary layer of dermis (PL), and reticular layer of dermis (RL). The papillary layer consists of loose connective tissue, and the reticular layer of dense irregular connective tissue. Observe collagen fibers with fibroblasts (ellipsoidal nuclei) in the reticular layer.