. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 4. Reproductive system of female Li-ardia hirschi. (A) One-micrometer longitudinal section through segments 10. 11. and 12 of a mature female from Lizard Island, showing late vitellogenic (or mature) oocytes. A pair of ciliated ducts (oviducts and/or nephridia) connect segments 10 and 11 with the funnel on the septum of segment 10 and the main duct in segment 11 (arrow). (B) Detail of sperm duct running ventrally along segment 11. Opening of the duct to the exterior (located in other sections) is indicated by arrow. (
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 4. Reproductive system of female Li-ardia hirschi. (A) One-micrometer longitudinal section through segments 10. 11. and 12 of a mature female from Lizard Island, showing late vitellogenic (or mature) oocytes. A pair of ciliated ducts (oviducts and/or nephridia) connect segments 10 and 11 with the funnel on the septum of segment 10 and the main duct in segment 11 (arrow). (B) Detail of sperm duct running ventrally along segment 11. Opening of the duct to the exterior (located in other sections) is indicated by arrow. (C) One-micrometer transverse section (slightly oblique) through segment 11 of female from One Tree Island, showing mature oocytes abutting gut. One spermatheca is visible, with its sperm storage area adjacent to a mature oocyte. The external opening to one of the oviducts is indicated by arrow, while the other oviduct is not emergent on this section. (D) Detail of the opening of a ciliated duct on the ventral pan of segment 11. (E) One-micrometer longitudinal section through bases of parapodia in segments 11 and 12, showing a spermatheca dorsally in each. Spermathecal opening at the posterior face of the parapodium in segment 11 indicated by arrow. Oocytes or varying stages of development are visible in the coelom. (F) One-micrometer longitudinal section through spermatheca. showing duct and sperm storage area. Sperm are poorly stained in this section. (G) One-micrometer transverse section through spermatheca of female from One Tree Island, showing sperm nuclei clearly. Abbreviations: a. acicula; amu. acicula muscle; c. cilia of oviduct or spermatheca; ch. notopodial chaetae; d, spermathecal duct; g. gut; mu, muscle; nc. ventral nerve cord; ne, neuropodial chaetae; o, oocyte; od. oviduct; pvo, previtellogenic oocyte; s, sperm; ss. sperm storage area of spermatheca. Scale lines: A, 100 /mi; B. 20 /am; C. 50 ^m; D. 10 pm: E. 50 fim; F and G, 10 Please note that these images
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
