. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE GONODUCT OF ASTERIAS VULGARIS 463. OS 1 FIGURE 1. Diagrammatic representation of one unit of the reproductive system of Astcrias rulijaris, showing its major components: the gonad, the gonoduct, and genital branches of the aboral haemal and coelomic (perihaemal) rings. The gonad is shown in external view, while the rest of the unit is shown in longitudinal section. The proportions of various parts of the unit are not representative of their actual dimensions, as several areas are magnified for clarity. Regions A, B, C, a
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE GONODUCT OF ASTERIAS VULGARIS 463. OS 1 FIGURE 1. Diagrammatic representation of one unit of the reproductive system of Astcrias rulijaris, showing its major components: the gonad, the gonoduct, and genital branches of the aboral haemal and coelomic (perihaemal) rings. The gonad is shown in external view, while the rest of the unit is shown in longitudinal section. The proportions of various parts of the unit are not representative of their actual dimensions, as several areas are magnified for clarity. Regions A, B, C, and D of the gonoduct are shown in the diagram. Symbols used are: C, coelom; CP ; coelomic pocket; DB, dermal branchiae; DR, dermis; EE, external epi- thelium; G, gonad; GCS, genital coelomic (perihaemal) sinus; GCT, connective tissue of the gonoduct; GHS, genital haemal strand; GP, gonopores; IS, inner sac of the gonad; L, lumen of the gonad; OS, outer sac of the gonad; SCT, subperitoneal connective tissue; SP, spine on a dorsolateral ossicle. thereafter intimately associated with various tissues in the wall of the ray. As it passes from the gonad to the body wall, the gonoduct accompanies genital branches of the aboral haemal and coelomic (perihaemal) rings, and it follows these proxi- mally and aborally for a variable distance; in section this relationship appears as in Figure 3. The gonoduct soon loses its relationship with the genital branches of the aboral haemal and coelomic (perihaemal) rings and enters a pocket in the body wall that is continuous with the general perivisceral coelom (Figs. 1 and 4, CP) ; this coelomic pocket leads toward the surface of the ray and subdivides to form the lumina of several dermal branchiae (Fig. 1, DB). It is lined by typical parietal peritoneum underlain by a layer of collagenous connective issue, called the subperitoneal connective tissue layer (Walker, 1974) ; the gonoduct passes. Please note that these images are extracted from scanne
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
