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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Rupik, Weronika |
| Description | Country affiliation: Poland Author Affiliation: Rupik W ( Department of Animal Histology and Embryology, Silesian University, 9 Bankowa Str., 40-007 Katowice, Poland. weronika.rupik@us.edu.pl) |
| Abstract | The mechanism of follicular lumen differentiation during thyroid gland morphogenesis in vertebrate classes is still unclear and the current knowledge regarding the origin and the mechanism of follicular lumen formation during thyroid differentiation in reptiles is especially poor. The present study reports on an ultrastructural investigation of thyroid follicle formation and follicular lumen differentiation in grass snake (Natrix natrix L.) embryos. The results of this study show that the earliest morphogenesis of the presumptive thyroid follicles in grass snake embryos appears to be similar to that described in embryos of other vertebrate classes; however, differences appeared during the later stages of its differentiation when the follicular lumen was formed. The follicular lumen in grass snake embryos was differentiated by cavitation; during thyroid follicle formation, a population of centrally located cells was cleared through apoptosis to form the lumen. This manner of follicular lumen differentiation indicates that it has an extracellular origin. It cannot be excluded that other types of programmed cell death also occur during follicular lumen formation in this snake species. |
| File Format | HTM / HTML |
| ISSN | 09442006 |
| Issue Number | 6 |
| Journal | Zoology |
| Volume Number | 115 |
| e-ISSN | 18732720 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-12-01 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Zoology Snakes Embryology Thyroid Gland Animals Female Organogenesis Ultrastructure Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Animal Science and Zoology |
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