Carnegie stage 1: Difference between revisions
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==Introduction== | ==Introduction== | ||
{| | {| | ||
| [[File:Early_zygote_labelled.jpg]] | | width=310 valign=top|[[File:Early_zygote_labelled.jpg|300px]] | ||
Human early zygote showing male and female pronuclei | Human early zygote showing male and female pronuclei | ||
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The early human zygote where the male and female pronuclei (centre of image) have not yet combined to form the single zygote nucleus. These pronuclei are the nuclei from the spermatozoa (sperm) and oocyte (egg) and contain all the nuclear genetic material (chromosomes, DNA, genes). | The early human {{zygote}} where the male and female {{pronuclei}} (centre of image) have not yet combined to form the single zygote nucleus. These pronuclei are the nuclei from the {{spermatozoa}} (sperm) and {{oocyte}} (egg) and contain all the nuclear genetic material (chromosomes, DNA, genes). | ||
Two of the egg's polar bodies (right, 3 o'clock position of image) are shown at the edge of the egg cytoplasm. These polar bodies contain the excess DNA from the meiotic divisions of the egg. | Two of the egg's {{polar bodies}} (right, 3 o'clock position of image) are shown at the edge of the egg cytoplasm. These polar bodies contain the excess DNA from the meiotic divisions of the egg. | ||
The zona pellucida (edge of image) forms a specialised thick extracellular matrix layer around both the egg and the developing conceptus for the first week. | The {{zona pellucida}} (edge of image) forms a specialised thick extracellular matrix layer around both the egg and the developing conceptus for the first week. | ||
The {{mitochondria}} in the cytoplasm contain additional genes and in humans these mitochondrial genes are entirely derived from the mother (oocyte). | |||
===Summary=== | |||
* Week 1, size 0.1 - 0.15 mm | |||
* fertilized oocyte, {{zygote}}, {{pronuclei}}, {{polar bodies}}, {{zona pellucida}} | |||
See also [[#Events|Events]] | |||
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{{Carnegie stage 1 links}} | |||
{{Carnegie_stage_table_1}} | |||
{{Carnegie stages}} | {{Carnegie stages}} | ||
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File:Human zygote two pronuclei 22.jpg|Human zygote two pronuclei (labelled) PMID 20579351 | File:Human zygote two pronuclei 22.jpg|Human zygote two pronuclei (labelled) PMID 20579351 | ||
File:Human-oocyte_to_blastocyst.jpg|Human oocyte to blastocyst PMID 19924284 | File:Human-oocyte_to_blastocyst.jpg|Human oocyte to blastocyst PMID 19924284 | ||
File:Human_fertilization_movie_1_frame_05.jpg|Human pronuclei | |||
</gallery> | </gallery> | ||
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| valign="bottom"|{{Human fertilization movie 2}} | | valign="bottom"|{{Human fertilization movie 2}} | ||
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==Historic Images== | |||
==Other Species== | |||
<gallery> | |||
File:Mouse pronuclei 02.jpg|Mouse | |||
File:Mouse_zygote_pronuclei_01.jpg|Mouse | |||
</gallery> | |||
==Events== | |||
{{fertilisation}} | |||
{{meiosis}} | |||
{{mitosis}} | |||
===References=== | |||
<references/> | |||
{{Ref-Zamboni1966}} | |||
==Additional Images== | |||
===Historic Images=== | |||
<gallery> | <gallery> | ||
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</gallery> | </gallery> | ||
Latest revision as of 09:09, 14 May 2020
Embryology - 25 Apr 2024 Expand to Translate |
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Introduction
Human early zygote showing male and female pronuclei |
The early human zygote where the male and female pronuclei (centre of image) have not yet combined to form the single zygote nucleus. These pronuclei are the nuclei from the spermatozoa (sperm) and oocyte (egg) and contain all the nuclear genetic material (chromosomes, DNA, genes). Two of the egg's polar bodies (right, 3 o'clock position of image) are shown at the edge of the egg cytoplasm. These polar bodies contain the excess DNA from the meiotic divisions of the egg. The zona pellucida (edge of image) forms a specialised thick extracellular matrix layer around both the egg and the developing conceptus for the first week. The mitochondria in the cytoplasm contain additional genes and in humans these mitochondrial genes are entirely derived from the mother (oocyte). Summary
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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
Carnegie stage 1
Electron Micrographs
Movies
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Other Species
Events
References
Zamboni L. Mishell DR. Jr. Bell JH. snd Baca M. Fine structure of the human ovum in the pronuclear stage. (1966) J. Cell Biol, 30: 579-600. PMID 6008199
Additional Images
Historic 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 1. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_1
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G