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The aim of this study was to describe the histological structure of the skin of greater rhea (Rhea americana), a ratite bird native to South America. Skin samples were taken from three regions of the trunk (alar, dorsal and pelvic) in 14 specimens which ages ranged from 7 days to adulthood. Serial sections were obtained and subjected to different staining procedures (haematoxylin and eosin, orcein,...
During tail regeneration in lizards, the epidermis forms new scales comprising a hard beta‐layer and a softer alpha‐layer. Regenerated scales derive from a controlled folding process of the wound epidermis that gives rise to epidermal pegs where keratinocytes do not invade the dermis. Basal keratinocytes of pegs give rise to suprabasal cells that initially differentiate into a corneous wound epidermis...
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