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Vascular supply of the central nervous system of the land snail Megalobulimus oblongus (Gastropoda, Pulmonata)

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Vascular supply of the central nervous system of the land snail Megalobulimus oblongus (Gastropoda, Pulmonata)

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Título Vascular supply of the central nervous system of the land snail Megalobulimus oblongus (Gastropoda, Pulmonata)
Autor Noblega, Hector Gabriel
Missaglia, Vivian
Stenert, Cristina
Heuser, Maria Cristina Faccioni
Achaval-Elena, Matilde
Abstract The vascularization of the central nervous system of the snail Megalobulimus oblongus was studied by injection of carmine-gelatin solution into the arterial system and using a histochemical technique for the detection of alkaline phosphatase. The central nervous system of M. oblongus is irrigated by the anterior aorta, from which a series of small branches emerge that supply the subesophageal nervous ganglia. In turn, these branches give rise to a series of smaller vessels that irrigate the buccal bulb, the anterior portion of the foot, the cerebral ganglia, the dorsal body gland, and the anterior portion of the reproductive system. No hemolymph vessels were detected within nervous tissue although such vessels were found in the periganglionic connective sheath. This connective sheath contains vascular loops and had a series of overlaps and projections that follow the contour of the nervous ganglia. This arrangement permits a larger area of interaction between the surface of the nervous tissue and the hemolymph and reduces the distance between the deepest portion of a given ganglion and the hemolymph vessels.
Contido em Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas. Ribeirão Preto, SP. Vol. 36, no. 9 (Sept. 2003), p.1247-1253
Assunto Bioquímica
Megalobulimus oblongus
Morfologia
Sistema nervoso central
[en] Alkaline phosphatase activity
[en] Carmine-gelatin
[en] Central nervous system
[en] Gastropods
[en] Trypan blue
[en] Vascular supply
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/21148
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