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dc.contributor.authorCavey, Michael J.en
dc.contributor.authorChan, Kincaid S.en
dc.contributor.authorWilkens, Jerrel L.en
dc.date.accessioned2006-08-14T16:38:41Z
dc.date.available2006-08-14T16:38:41Z
dc.date.issued2006
dc.identifier.citationChan, K. S., Cavey, M. J., Wilkens, J. L. 2006 "Microscopic anatomy of the thin-walled vessels leaving the heart of the lobster Homarus americanus: anterior lateral arteries" Invertebrate Biology 125: 76–88en
dc.identifier.issn1077-8306
dc.identifier.urihttp://hdl.handle.net/1880/43409
dc.description.abstractThe anterior lateral arteries are paired vessels leaving the anterior end of the lobster (Homarus americanus) heart and proceeding to the antennae and eyestalks, the stomach and hepatopancreas, the gonads, and the thoracic and branchial muscles. These vessels have a trilaminar organization, consisting of a tunica interna with elastic fibrils, a tunica intermedia represented by a bilayered cell mass, and a tunica externa with collagen fibrils. In the tunica intermedia, cells flanking the tunica interna (light cells) show less affinity for basic dyes and electron stains than those flanking the tunica externa (dark cells). Each light cell exhibits an irregularly shaped stress fiber (a bundle of closely packed microfilaments) in the region adjoining the tunica interna. Collectively, these bundles have a circumferential or slightly oblique orientation relative to the lumen of the vessel. The role of the stress fibers is unresolved. If they are static structures, they might contribute to the non-linear elasticity shown by lobster arteries. If they generate force, and small bundles of microfilaments do diverge from the stress fibers to enter filamentous mats applied to the plasmalemmata, a coordinated contraction of the cells might reduce the luminal diameter and, thus, retard the flow of hemolymph. Coordination of contraction would have to occur in the absence of nerves and without the benefit of communicating (gap) junctions between the light and dark cells.en
dc.description.sponsorshipAmerican Microscopical Society, American Society of Zoologists. Division of Invertebrate Zoology.en
dc.format.extent3162419 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherBlackwell Publishing, Inc.en
dc.subjectBiologyen
dc.subject.otherF-actin immunohistochemistryen
dc.subject.otherhemolymph vesselen
dc.subject.othermicrofilamentsen
dc.titleMicroscopic anatomy of the thin-walled vessels leaving the heart of the lobster Homarus americanus: anterior lateral arteriesen
dc.typejournal article
dc.description.refereedyesen
dc.contributor.institutionUniversity of Calgaryen
dc.contributor.facultyFaculty of Scienceen
dc.contributor.departmentBiological Sciencesen
dc.publisher.urlhttp://www.blackwell-synergy.com/doi/full/10.1111/j.1439-0485.2005.00051.x
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/35106


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