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We studied structure and ultrastructure of the subepidermal connective tissue (SEC) of the integument of three cephalopods (Sepia officinalis, Octopus vulgaris and Loligo pealii). In all species, three distinct regions of the SEC were recognised: (a) an outer zone (OZ) that included the dermal-epidermal junction, and consisted of a thin layer of connective tissue containing muscles, (b) an extensive...
The modified subdigital scales of some lizards allow them to climb vertical surfaces. This is due to the action of millions of tiny setae present in the digital pads. Setae are mainly composed of beta-keratin which may have some modality of aggregation similar to that of barbs and barbules of feathers. Keratins and associated proteins are involved in the organization of setae. The formation of setae...
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