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Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae)
Cytological changes of the epithelial cells according to the developmenatal phases of the seminal vesicle related to the spermatogenic stages in the testicular lobules during spermagenesis in male Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) were investigated monthly by electron microscop...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Korean Society of Developmental Biology
2016
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5078150/ https://www.ncbi.nlm.nih.gov/pubmed/27796006 http://dx.doi.org/10.12717/DR.2016.20.3.247 |
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author | Kim, Sung Han |
author_facet | Kim, Sung Han |
author_sort | Kim, Sung Han |
collection | PubMed |
description | Cytological changes of the epithelial cells according to the developmenatal phases of the seminal vesicle related to the spermatogenic stages in the testicular lobules during spermagenesis in male Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) were investigated monthly by electron microscopical and histological observations. N. (B) cumingii is dioecious, and an internal fertilization species. The male genital organ is located near the tentacles. The spermatozoon is approximatley 50 μm in length. The axoneme of the tail flagellum consists of nine pairs of microtubles at the periphery and one pair at the center. The process of germ cell development during spermatogenesis can be divided into five succesive stages: (1) spermatogonia, (2) primary spermatocytes, (3) secondary spermatocytes, (4) spermatids, and (5) spermatozoa. A considerable amount of spermatozoa make their appearance in the testicular lobules (or acini) and some of them are tranported from the testis towards the seminal vesicles until late July. In this study, the developmental phases of the epithelial cells of the seminal vesicles of N. (B.) cumingii could be classified into four phases: (1) S-I phase (resting), (2) S-Ⅱphase (early accumulating), (3) S-Ⅲ phase (accumulating), and (4) S-IV phase (spent). However, in case of N. (B.) arthritica cumingii, the developmental phases of the seminal vesicle were devided into three phases: (1) resting, (2) accumulating and (3) spent. Granular bodies in the inner layer of the seminal vesicles are involved in resorption of digestion of residual spermatozoa. |
format | Online Article Text |
id | pubmed-5078150 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Korean Society of Developmental Biology |
record_format | MEDLINE/PubMed |
spelling | pubmed-50781502016-10-28 Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) Kim, Sung Han Dev Reprod Research Paper Cytological changes of the epithelial cells according to the developmenatal phases of the seminal vesicle related to the spermatogenic stages in the testicular lobules during spermagenesis in male Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) were investigated monthly by electron microscopical and histological observations. N. (B) cumingii is dioecious, and an internal fertilization species. The male genital organ is located near the tentacles. The spermatozoon is approximatley 50 μm in length. The axoneme of the tail flagellum consists of nine pairs of microtubles at the periphery and one pair at the center. The process of germ cell development during spermatogenesis can be divided into five succesive stages: (1) spermatogonia, (2) primary spermatocytes, (3) secondary spermatocytes, (4) spermatids, and (5) spermatozoa. A considerable amount of spermatozoa make their appearance in the testicular lobules (or acini) and some of them are tranported from the testis towards the seminal vesicles until late July. In this study, the developmental phases of the epithelial cells of the seminal vesicles of N. (B.) cumingii could be classified into four phases: (1) S-I phase (resting), (2) S-Ⅱphase (early accumulating), (3) S-Ⅲ phase (accumulating), and (4) S-IV phase (spent). However, in case of N. (B.) arthritica cumingii, the developmental phases of the seminal vesicle were devided into three phases: (1) resting, (2) accumulating and (3) spent. Granular bodies in the inner layer of the seminal vesicles are involved in resorption of digestion of residual spermatozoa. Korean Society of Developmental Biology 2016-09 /pmc/articles/PMC5078150/ /pubmed/27796006 http://dx.doi.org/10.12717/DR.2016.20.3.247 Text en © Journal of the Korean Society of Developmental Biology. All Rights Reserved http://creativecommons.org/licenses/by-nc/3.0/ This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Paper Kim, Sung Han Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) |
title | Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) |
title_full | Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) |
title_fullStr | Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) |
title_full_unstemmed | Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) |
title_short | Developmental Phases of the Seminal Vesicle related to the Spermatogenic Stages in the Testicular Lobules of Neptunea (Barbitonia) cumingii (Gastropoda: Buccinidae) |
title_sort | developmental phases of the seminal vesicle related to the spermatogenic stages in the testicular lobules of neptunea (barbitonia) cumingii (gastropoda: buccinidae) |
topic | Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5078150/ https://www.ncbi.nlm.nih.gov/pubmed/27796006 http://dx.doi.org/10.12717/DR.2016.20.3.247 |
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