https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30729 Galeolaria caespitosa (Polychaeta: Serpulidae), which has significant potential as a bio-indicator species of coastal marine pollution. The abdomen of G. caespitosa was divided by intersegmental septa into over 80 trunk segments. Each segment served as a germinal chamber with a C-shaped gonadal arrangement consisting of several distinct compartments: a seminiferous epithelium (SE) compartment located in the centre of the chamber, with each of its two ends connecting to a nurse cell (NC) compartment and then an efferent duct (ED) compartment. The SE compartment contained a multilayered seminiferous epithelium where spermatogenesis was initiated. Spermatids were released in pairs into the lumen of the SE compartment and then transported to the NC compartment where they underwent spermiogenesis with the support of secretory vesicles released by the nurse cells. Spermatozoa were stored in the ED compartment and subsequently released into the seawater through the vas deferens. Unlike vertebrates where germ cells differentiated in close proximity to the nurse cell population (i.e. Sertoli cells), the spermatogenic cells of G. caespitosa exhibited no direct contact with supporting cells at any spermatogenic stage. This finding suggested that the spermatogenesis in G. caespitosa was more dependent on intrinsic developmental programming than most species. Notwithstanding such differences, there were clear parallels between the male reproductive system of G. caespitosa and mammals, in terms of the structure and function. The independence of spermatogenic cells from supporting cells in G. caespitosa raised the possibility of inducing spermiogenesis in vitro, which would provide a useful tool to dissect the mechanisms underlying this complex cell differentiation process in invertebrates and other higher order animals.]]> Wed 11 Apr 2018 14:39:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1273 Wed 11 Apr 2018 14:07:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:14892 Wed 11 Apr 2018 13:50:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30799 Wed 11 Apr 2018 10:41:45 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33765 Thu 10 Jan 2019 17:54:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3007 Sat 24 Mar 2018 08:33:06 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1076 Sat 24 Mar 2018 08:32:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1512 Sat 24 Mar 2018 08:30:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:2392 Sat 24 Mar 2018 08:29:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:2500 Sat 24 Mar 2018 08:27:43 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17419 Sat 24 Mar 2018 08:01:38 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17890 Sat 24 Mar 2018 07:56:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43567 Fri 23 Sep 2022 11:57:30 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33851 Fri 18 Jan 2019 15:09:47 AEDT ]]>