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sporocyst

sporocyst

sporocyst Sentence Examples

  • But whilst in Trematoda a digestive sac is invariably present except in the sporocyst larval stage, the Cestodes possess no trace of this organ at any stage of their development.

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  • A, The free-swimming embryo.- B, A sporocyst containing young rediae.

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  • The cilia are lost, the eye-spots disappear, the digestive sac vanishes and the larva becomes a sac or "sporocyst" full of germ-cells.

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  • These cells aggregated in masses become the bodies of another generation of larvae within the sporocyst.

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  • By a series of changes similar to those by which the primary larva arose from a segmented egg, so do these secondary larvae or "rediae" arise from the germ-cells or germ-balls within the sporocyst.

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  • The movements and activity of the redia cause it to burst the wall of the sporocyst.

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  • (Highly magnified; after Ziegler.) F, Portion of a sporocyst containing Bucephali in process of development.

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  • Distomum macrostomum, which occurs in various birds, produces a very curious sporocyst in the body of the snail Succinea putris.

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  • In many cases it appears that only the brilliantly coloured tentacle is pecked off by the bird, and as the snail can easily regenerate a new one, this in turn becomes infected by a fresh branch of the sporocyst ramifying through the snail and thus a new supply of larvae is speedily provided (Heckert).

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  • The sporocyst stage obtains nutrients by passage of soluble material across the sporocyst stage obtains nutrients by passage of soluble material across the sporocyst tegument.

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  • This sporocyst assumes a branched structure and penetrates into the tentacles of the snail (fig.

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  • The sporocyst stage obtains nutrients by passage of soluble material across the sporocyst tegument.

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