Applied Microscopy
- 제15권1호
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- Pages.31-58
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- 1985
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- 2287-5123(pISSN)
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- 2287-4445(eISSN)
한국산(韓國産) 플라나리아(Dugesia japonica Ichikawa et Kawakatsu)생식기관(生殖器官)의 미세구조(微細構造)에 관(關)한 연구(硏究)
A Study on the Ultrastructure of Reproductive Organ of Korean Planaria (Dugesia japonica)
- Chang, N.S. (Daejeou Medical Junior College) ;
- Kim, W.K. (Dept. of Biology, Korea University)
- 발행 : 1985.05.01
초록
The morphological study on different types of cells of reproductive organ including spermatogenesis in the adult planaria was performed to observe their cytochemical and ultrastructural characteristics. 1. Spermatogenesis The circular luminated material appears immediately inside the nuclear envelope of early spermatid and is found also in the nucleus of sperm, but typical acrosomal structures cannot be observed. Approximately ten of small-sized mitochondria occur around the nucleus in the transitional phase from primary spermatocyte to secondary spermatocyte, but in sperm a long mitochondrion is closely associated with nucleus, parellel to long axis of it. The sperm has a relatively long head connected with two tails via hollow neck. 2. Reproductive organ The penis bulb and the bursa stalk were observed. (1) Penis bulb The cells constituted penis bulb are classified into six types on the basis of ultrastructure of the cells and cytochemistry of the cytoplasmic granules. 1) A-type cells: These cells exhibiting low electron density are mainly occupied by large nucleus. These cells possess two different types of granules: highly electron-dense round granules with an average size of
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