Carnegie stage 3: Difference between revisions
mNo edit summary |
|||
(17 intermediate revisions by the same user not shown) | |||
Line 2: | Line 2: | ||
==Introduction== | ==Introduction== | ||
{| | {| | ||
| [[File:Human embryo day 5 label2.jpg|400px]] | | width=405px|[[File:Human embryo day 5 label2.jpg|400px]] | ||
Human blastocyst (day 5) still within zone pellucida. | Human blastocyst (day 5) still within zone pellucida. | ||
Line 9: | Line 9: | ||
It is only after hatching that the blastocyst can attach to and then implant into the uterine wall. | It is only after hatching that the blastocyst can attach to and then implant into the uterine wall. | ||
===Summary=== | |||
* Week 1, 4 - 5 days, size 0.1 - 0.2 mm | |||
* {{zona pellucida}}, {{trophoblast}} (trophectoderm) shell, [[I#inner cell mass|inner cell mass]], [[B#blastoceol|blastoceol]] | |||
See also [[#Events|Events]] | |||
{{Carnegie stage 3 links}} | |||
<br> | |||
{{Carnegie_stage_table_1}} | |||
|- | |- | ||
| [[File:Human embryo day 5 label.jpg|400px]] | | [[File:Human embryo day 5 label.jpg|400px]] | ||
| [[File:Human embryo day 5.jpg|Stage 3 Day 5]] | | [[File:Human embryo day 5.jpg|Stage 3 Day 5]] | ||
|} | |} | ||
{{Carnegie stages}} | |||
==Blastocyst Hatching== | ==Blastocyst Hatching== | ||
Line 40: | Line 44: | ||
{{Human blastocyst movie 4}} | {{Human blastocyst movie 4}} | ||
==Histiotrophic Nutrition== | ==Histiotrophic Nutrition== | ||
Line 64: | Line 57: | ||
| [[File:Stage3 bf02.jpg|400px]] | | [[File:Stage3 bf02.jpg|400px]] | ||
|- | |- | ||
| 58 cell blastocyst (day 4) | | 58 cell blastocyst (day 4) (No. {{CE8794}}) | ||
| 107 cell blastocyst (day 4.5) | | 107 cell blastocyst (day 4.5) (No. {{CE8663}}) | ||
|} | |} | ||
{{Carnegie Embryo iBook table}} | {{Carnegie Embryo iBook table}} | ||
==Events== | |||
* '''{{mitosis}}''' - blastomere cells divide by mitosis, without growth between divisions. initially at the same time (synchronous) but with each round at slightly different times (asynchronous) | |||
* '''{{blastocyst}}''' - a fluid-filled cavity develops within the cell mass. | |||
===References=== | |||
<references/> | |||
{{Ref-Hertig1956}} | |||
==Additional Images== | |||
{{Carnegie_stages}} | {{Carnegie_stages}} | ||
Revision as of 00:18, 7 June 2018
Embryology - 25 Apr 2024 Expand to Translate |
---|
Google Translate - select your language from the list shown below (this will open a new external page) |
العربية | català | 中文 | 中國傳統的 | français | Deutsche | עִברִית | हिंदी | bahasa Indonesia | italiano | 日本語 | 한국어 | မြန်မာ | Pilipino | Polskie | português | ਪੰਜਾਬੀ ਦੇ | Română | русский | Español | Swahili | Svensk | ไทย | Türkçe | اردو | ייִדיש | Tiếng Việt These external translations are automated and may not be accurate. (More? About Translations) |
Introduction
Human blastocyst (day 5) still within zone pellucida. |
The free-floating blastocyst has reached the uterine body still enclosed in the zone pellucida and "hatches" from this surrounding extracellular matrix.
It is only after hatching that the blastocyst can attach to and then implant into the uterine wall. Summary
See also Events
| ||||||||||||||||||||
- 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
Blastocyst Hatching
|
|
|
Histiotrophic Nutrition
Term used to describe in early placenta development the intital transfer of nutrition from maternal to embryo (histiotrophic nutrition) compared to later blood-borne nutrition (hemotrophic nutrition). Histotroph is the nutritional material accumulated in spaces between the maternal and fetal tissues, derived from the maternal endometrium and the uterine glands. This nutritional material is absorbed by phagocytosis initially by blastocyst trophectoderm and then by trophoblast of the placenta. in later placental development nutrition is by the exchange of blood-borne materials between the maternal and fetal circulations, hemotrophic nutrition.
Reference
<pubmed>12050279</pubmed>
Carnegie Collection
58 cell blastocyst (day 4) (No. 8794) | 107 cell blastocyst (day 4.5) (No. 8663) |
iBook - Carnegie Embryos | |
---|---|
|
Events
- mitosis - blastomere cells divide by mitosis, without growth between divisions. initially at the same time (synchronous) but with each round at slightly different times (asynchronous)
- blastocyst - a fluid-filled cavity develops within the cell mass.
References
Hertig AT. Rock J. and Adams EC. A description of 34 human ova within the first 17 days of development. (1956) Amer. J Anat., 98:435-493.
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
Cite this page: Hill, M.A. (2024, April 25) Embryology Carnegie stage 3. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_3
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G