Carnegie stage 6: Difference between revisions
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:'''Links:''' [[Week 2]] | [[Implantation]] | [[Lecture - Week 1 and 2 Development|Lecture]] | [[ | :'''Links:''' [[Week 2]] | [[Implantation]] | [[Lecture - Week 1 and 2 Development|Lecture]] | [[ANAT2341_Lab_2|Practical]] | [[Carnegie_stage_7|Stage 7]] | ||
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Revision as of 10:22, 7 February 2014
Embryology - 20 Apr 2024 Expand to Translate |
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Introduction
Bilaminar embryonic disc |
The bilaminar (two layer) embryo is now about 0.2 mm diameter in size. The three extra embryonic spaces (amniotic, primitive yolk sac and chorionic) are present.
The large chorionic cavity is surrounded by the cell layers extending to form chorionic villi. These villi are the beginning of the functional units of the placenta. Outside of these villi, and extending from their tips, trophoblasts invade the maternal decidua forming maternal blood-filled lacunae (lakes). Emptying into these maternal lacuna are both uterine glands and spiral arteries held open by trophoblast cells. The maternal uterine wall continues to undergo expanding decidualization in response to the implantation process. Facts: Human embryonic stage 6 occurs towards the end of week 2 at approximately 13-14 days.
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- Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline
Carnegie Collection
Embryonic Disc | Primitive streak region (gastrulation) |
iBook - Carnegie Embryos | |
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Other Embryos
- Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline
Glossary Links
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Cite this page: Hill, M.A. (2024, April 20) Embryology Carnegie stage 6. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_6
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G