Carnegie stage 5: Difference between revisions
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==Events== | ==Events== | ||
* | * [[Cell Division - Mitosis|'''Mitosis''']] - cells on surface of blastocyst (trophoblast cells) divide more rapidly than the inner cells (inner cell mass, embryoblast) | ||
* [[Implantation|'''Implantation''']] - adhesion to endometrium epithelium and implantation through this layer into the underlying uterine storm. | |||
* [[Human Chorionic Gonadotropin|'''Endocrine signalling''']] - trophoblast cells secrete hCG (human Chorionic Gonadotropin/Gonadotrophin) the signal of pregnancy. | |||
* [[Trophoblast|'''Cell invasion and fusion''']] - trophoblast cells spread through the maternal uterine wall and also fuse together to form specialised multi-nucleated cells. | |||
* [[Ovary_Development#Corpus_Luteum|'''Corpus luteum''']] - signal from trophoblasts maintain this endocrine tissue in the maternal ovary that secretes progesterone. | |||
===References=== | ===References=== | ||
<ref name=“PMID”><pubmed></pubmed></ref> | |||
<references/> | <references/> | ||
Revision as of 09:12, 17 August 2016
Embryology - 23 May 2024 Expand to Translate |
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Introduction
Facts: Week 1 - 2, size 0.1 - 0.2 mm
Summaryimplantation completed, inner cell mass, bilaminar embryo, trophoblast development.
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Week: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Carnegie stage: | 1 2 3 4 | 5 6 | 7 8 9 | 10 11 12 13 | 14 15 | 16 17 | 18 19 | 20 21 22 23 |
- 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
<html5media height="300" width="250">File:Chorion 001.mp4</html5media> |
Animation (left) shows the events following implantation and focuses on changes in the the spaces surrounding the embryonic disc, the extraembryonic coelom. The blastoceol cavity is converted into two separate spaces: the yolk sac and the chorionic cavity. The third space lies above the epiblast, the amniotic cavity.
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Chorionic Cavity Movie | MP4 movie |
Surface View
This is a uterine surface view showing the site of implantation (pale region in centre of image). The conceptus can be identified located at the dark central region within the pale region.
Carnegie Collection
Stage 5a
Stage 5b
Stage 5c
Carnegie Collection - Stage 5 | ||||||||||
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Serial No. | Stage | Grade | Fixative | Embedding Medium | Thinness (µm) | Stain | Year | Notes | ||
8020 | 5a | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1942 | Hertig and Rock (1945a)[1] | ||
8155 | 5a | Exc. | Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1943 | Hertig and Rock (1949)[2] | ||
8225 | 5a | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1944 | Hertig and Rock (1945b)[3] | ||
8004 | 5b | Exc | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1942 | Hertig and Rock (1945a)[1] | ||
8171 | 5b | Exc | Alc. | C-P | 6 | (Stain - Haematoxylin Eosin) | 1943 | Hertig and Rock (1949)[2] | ||
8215 | 5b | Exc | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1944 | Hertig and Rock (1945c)[4] | ||
9350 | 5b | Exc | Bouin | ? | ? | (Stain - Haematoxylin Eosin) | 1955 | Heuser (1956)[5] | ||
4900 | 5c | Poor | p | P | 10 | p | 1925 | Incomplete. Streeter (1926)[6] | ||
7699 | 5c | Exc. | Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1939 | Hertig and Rock (1941)[7] | ||
7700 | 5c | Exc. | Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1938 | Hertig and Rock (1941)[7] | ||
7771 | 5c | Exc. | Bouin | C-P | 10 | (Stain - Haematoxylin Eosin) | 1940 | Abnormal | ||
7950 | 5c | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1941 | Hertig and Rock (1944)[8] | ||
8000 | 5c | Poor | Alc. & Bouin | C-P | 8 | (Stain - Haematoxylin Eosin) | 1942 | Abnormal | ||
8139 | 5c | Exc. | ? | C-P | 6 | (Stain - Haematoxylin Eosin) | 1943 | Incomplete. Marchetti (1945)[9] | ||
8299 | 5c | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin), phlox. | 1945 | Abnormal | ||
8329 | 5c | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin), phlox. | 1945 | Abnormal | ||
8330 | 5c | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin), phlox. | 1945 | |||
8370 | 5c | Poor | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin), phlox. | 1946 | Abnormal | ||
8558 | 5c | Exc. | Alc. & Bouin | C-P | 6 | (Stain - Haematoxylin Eosin) | 1947 | |||
Stage 5 was originally subdivided into 3 sequential parts a, b, c.
Abbreviations
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References
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iBook - Carnegie Embryos | |
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Events
- Mitosis - cells on surface of blastocyst (trophoblast cells) divide more rapidly than the inner cells (inner cell mass, embryoblast)
- Implantation - adhesion to endometrium epithelium and implantation through this layer into the underlying uterine storm.
- Endocrine signalling - trophoblast cells secrete hCG (human Chorionic Gonadotropin/Gonadotrophin) the signal of pregnancy.
- Cell invasion and fusion - trophoblast cells spread through the maternal uterine wall and also fuse together to form specialised multi-nucleated cells.
- Corpus luteum - signal from trophoblasts maintain this endocrine tissue in the maternal ovary that secretes progesterone.
References
- ↑ <pubmed></pubmed>
Additional Images
- 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
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, May 23) Embryology Carnegie stage 5. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_5
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G