Functional morphology of the dorsal vessel in the adult fly Protophormia terraenovae (diptera, calliphoridae)

Journal of Morphology
Anna Maria AngioyD Dulcis

Abstract

The morphology and ultrastructure of the contractile tubular vessel acting as the cardiac pump in Protophormia terraenovae flies were analyzed by means of light microscopy, SEM and TEM. The results provide a novel anatomical picture of the two vessel portions, the abdominal heart and the aorta, and lay the foundations for an interpretation of the cardiocirculatory function in the fly. In the thorax, the thin and unchambered aorta is without apertures, while the abdominal heart presents a very small caudal aperture and pairs of lateral ostia, one in each of the five chambers of which it is composed. The ostia of the four more distal chambers are of the incurrent type, which is to say that they act as valves ensuring that hemolymph flows only into the heart. Conversely, the ostia in the most proximal chamber allow hemolymph to flow both into and out of the heart. The entire vessel is composed of a single layer of myofibers that are oriented circularly around the lumen in the abdominal heart and longitudinally in the thoracic aorta. The abdominal heart has a thicker wall, a far more diffused and thick distribution of tracheoles, and a far greater number of mitochondria with respect to the aorta. This arrangement ensures a greater ...Continue Reading

References

Jan 1, 1969·Zeitschrift für Zellforschung und mikroskopische Anatomie·B Baccetti, E Bigliardi
Aug 1, 1968·Journal of Insect Physiology·J W Sanger, F V McCann
Sep 1, 1965·Annals of the Entomological Society of America·R C Ballard, B Holcomb
Oct 1, 1980·Journal of Comparative and Physiological Psychology·B Thon
Sep 15, 1996·Developmental Biology·R P Harvey

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Citations

Mar 4, 2017·The Journal of Experimental Biology·Kay LammersAchim Paululat
Mar 20, 2012·Arthropod Structure & Development·Christine LehmacherAchim Paululat

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