Read e-book online The Nervous Systems of Invertebrates: An Evolutionary and PDF

By PD Dr. Dr. O. Breidbach, Prof. Dr. W. Kutsch (auth.), PD Dr. Dr. O. Breidbach, Prof. Dr. W. Kutsch (eds.)

ISBN-10: 3034892195

ISBN-13: 9783034892193

ISBN-10: 3034899491

ISBN-13: 9783034899499

In this quantity remarkable experts assessment the cutting-edge in apprehensive procedure examine for all major invertebrate teams. they supply a finished updated research vital for everybody engaged on neuronal points of unmarried teams, in addition to considering the phylogenesis of invertebrates. The articles record on lately won wisdom approximately diversification within the invertebrate anxious platforms, and reveal the analytical strength of a comparative strategy. Novel suggestions in molecular and developmental biology are developing new views that time towards a theoretical beginning for a contemporary organismic biology. The comparative procedure, as documented the following, will interact the curiosity of someone challenged through the matter of structural diversification in biology.

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Extra info for The Nervous Systems of Invertebrates: An Evolutionary and Comparative Approach: With a Coda written by T.H. Bullock

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Note the two pharyngeal nerve rings (PN). Brain (B), ciliary pit (CP) (Reuter, 1994). Figure 18. Neurons (Nc)and neuronal processes (Np) in gastroderm of Microstomum lineare. Granular club cell (Gc), phagocytic cell (Pc), muscle (M), synapse (thick arrow), basal lamina (thin arrow) (Reuter and Palmberg, 1987). Genital plexus An enormous production of eggs is characteristic of parasitic flatworms and represents an important target for chemotherapeutic attack. CSLM analyses of the NS of the reproductive organs of Fasciola hepatica, S.

Dendriticum the NS consists of only two 5HT-IR main nerve cords connected by a commissure (Wikgren, 1986) (Fig. 12). In cercarians of the digenean Schistosoma mansoni and in adult cestodes a pair of central main cords project from the bilobed brain, while peripheral nerves occur associated to the peripheral musculature (Skuce et al. 1990; Gustafsson and Reuter, 1992). The orthogonal pattern during the life-cycle Parasitic flatworms go through more or less complicated life-cycles. The adaptations of NS to the changes in the external environment have been studied only in single species.

This becomes even more evident when the "inner" surface is compared with the "outer" surface of the scolex, where far fewer nerve terminals are found and with the subtegument of the strobila (Gustafsson, 1985, 1992). 37 Figure 16. Innervation of nutrient absorbing inner bothridial surface of Diphyllobothrium dendriticum. Note abundance of nerve terminals IR to seven different neuronal mediators beneath basal lamina. V = place for host villus, n = main nerve cord (Gustafsson, 1992). The pharyngeal and stomatogastric nervous system Flatworms are the most primitive animals in which we can find an alimentary tract, with mouth, pharynx and intestine.

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The Nervous Systems of Invertebrates: An Evolutionary and Comparative Approach: With a Coda written by T.H. Bullock by PD Dr. Dr. O. Breidbach, Prof. Dr. W. Kutsch (auth.), PD Dr. Dr. O. Breidbach, Prof. Dr. W. Kutsch (eds.)


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