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Read e-book online Biology of the Integument: 2 Vertebrates PDF

By A. Gedeon Matoltsy, Jürgen Bereiter-Hahn (auth.), Prof. Dr. Jürgen Bereiter-Hahn, Prof. Dr. A. Gedeon Matoltsy, Dr. K. Sylvia Richards (eds.)

ISBN-10: 3662009897

ISBN-13: 9783662009895

ISBN-10: 3662009919

ISBN-13: 9783662009918

The integument performs a major position within the survival of meta­ zoans through setting apart and retaining them from a adverse environ­ ment. Its functionality levels from defense opposed to harm and in­ fection, participation within the legislation of physique temperature and water stability, to respiration task, tracking of the environ­ ment and creation of signs concerning behaviour. most of these consequence from particular structural, biochemical and physiological homes of intra-and extracellular parts of the integu­ ment. hence its characterization could be top finished by way of a multidisciplinary procedure with authors really expert in numerous fields of technology. This multi-author publication, in volumes, offers an up-to­ date survey of the literature. the 1st quantity offers with the integument of invertebrates, the second one with that of vertebrates, either prepared totally on a phylum foundation. because the point of information at the integument of phyla differs significantly, the data supplied is correspondingly both restricted or con­ densed. For the various smaller teams of invertebrates little info is out there, as frequently just a couple of electron micrographs are to be present in the literature ; nevertheless, from the massive physique of information latest for vertebrates, rather for mammals, no entire evaluation could be supplied, yet publica­ tions giving entry to extra info were reviewed critically.

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Randall et al. (1981) found a proteinaceous crinotoxin in the muraenid Lycodontis but it is not certain that it originates in the club cells. In Anguilla the vacuoles may be weakly PAS-positive but in the outer parts of the epidermis the major reaction in the vacuoles is for protein. Deeper, the vacuoles stain blue rather than red or orange by polychrome stains and are negative to bromphenol blue. It appears that the secretion is modified as the club cell matures. Muraena helena also has a mixed population of club cells in this respect, but in Conger all the vacuoles appear similar and react for basic proteins, staining strongly with sirius red, which left the cytoplasm of the club cells unstained (Whitear and Zaccone 1984).

The origin of these various substances, and their route to the surface, is uncertain. They could be derived from any of the epidermal elements, or from the intrusive blood cells. The IgM in fish mucus is a dimer, whereas serum IgM is tetra- or monomeric, suggesting aseparate origin (Lobb and Clem 1981). It has been suggested that agglutination is a property of mucus in general (Fountain 1982). The fry of Symphysodon discus gain essential immunity as well as nutriment when feeding on the copious mucus of their parents (Hildemann 1959, 1962).

Leucocytes are most numerous between and above the basal layer cells but may occur at any level of the epidermis and are sometimes exposed at the surface if the skin is damaged. In some tropical species leucocytes form an almost continuous layer above the basal cells (Mittal and Banerjee 1974). Although these authors, and Kann (1926), refer to "lymph spaces" in the epidermis, the leucocytes are lying in the intercellular space, not within vessels (Mittal et al. 1980). The "eosinophilic granular cells" (Sect.

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Biology of the Integument: 2 Vertebrates by A. Gedeon Matoltsy, Jürgen Bereiter-Hahn (auth.), Prof. Dr. Jürgen Bereiter-Hahn, Prof. Dr. A. Gedeon Matoltsy, Dr. K. Sylvia Richards (eds.)

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