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By P. D. Evans

Insect body structure is at the moment present process a revolution with the elevated software of molecular organic innovations to enquire the molecular mechanisms underlying the physiological responses to insect cells. Advances in Insect body structure has instituted a dedication to the book of top of the range stories on molecular biology and molecular genetics in parts the place they supply an elevated knowing of physiological methods in bugs. quantity 24 is the 1st to incorporate such in particular sought articles.

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1982). (A rather similar structure is apparent within each group (acridid vs. gryllid); the difference between both groups points to a specialization of the FETi in acridids towards a jumping function (see above, a similar argument for serial homologues) . For a fine control of head movements, the neck muscles are arranged in a seemingly sophisticated manner. Also, the innervation is complex with muscles sharing the same MNs. Honegger et al. (1984) have compared the relevant motor system of crickets with that of locusts.

B) The G-neuron arises from NB 7-4 (drawn in black). The G-cell homologues develop from a twin of a ganglion mother cell arising from neuroblast 7-4 in the appropriate ganglion. (C) Camera lucida drawings of the G, B1 and B2 neurone in adult Locusta migratoria; the Gneurone is located in the mesothoracic ganglion, the B1-neurone is located in the metathoracic neuromere, and the BZneurone is located mainly in the first abdominal neuromer, which is fused with the metathoracic neuromere in adult locusts.

1989). The system appears to be a primitive one, since it also exists in the Thysanura (Edwards and Reddy, 1986). The system consists of sensory neurones of cercal filiform hairs. , 1989). Because of the size of their ascending axons, the giants attracted early interest (Roeder, 1948). , 1981). Comparative analysis of this system includes locusts, crickets and praying mantis (Fig. 5 ) . In the cricket, Jacobs and Murphey (1987) have summarized the segmental origins of the giant neurones during ontogeny.

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