Difference between revisions of "File:Early zygote.jpg"

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(About Carnegie Stages 1 Facts: Week 1, size 0.1-0.15 mm Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/wwwhuman/Stages/Stage1.htm)
 
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About Carnegie Stages 1
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==Early Zygote==
Facts: Week 1, size 0.1-0.15 mm
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An early human zygote due to the presence of male and female pronuclei in the centre of the cytoplasm. (see also [[:File:Early zygote labelled.jpg|labelled image]])
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The haploid '''pronuclei''' of the male (spermatozoa) and female (oocyte) have not yet combined to form a single nucleus.
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The '''polar bodies''' can be seen at the edge of the cytoplasm (at 3 o'clock position). These exclusion bodies contain the additional oocyte DNA produced in meiosis.
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The '''zona pellucida''' forms the thick clear layer that surrounds the cell.
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At this stage ''in vivo'':
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* there would still be granulosa cells and spermatozoa attached to the zone pellucida.
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* the zygote floats freely within the uterine tube.
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* The cell is preparing for the first mitotic division.
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:[[Zygote|'''Links''']]: [[Carnegie stage 1]] | [[:File:Early zygote.jpg|Image - Early zygote]] | [[:File:Early zygote labelled.jpg|Image - Early zygote labelled]] | [[Fertilization]] | [[Zygote]]
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===About Carnegie Stages 1===
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Facts: Week 1, size 0.1 - 0.15 mm (100 - 150 microns)
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Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida
 
Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida
  
Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/wwwhuman/Stages/Stage1.htm
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{{Footer}}
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[[Category:Carnegie Stage]] [[Category:Carnegie Stage 1]] [[Category:Week 1]] [[Category:Zygote]]

Latest revision as of 13:15, 20 July 2015

Early Zygote

An early human zygote due to the presence of male and female pronuclei in the centre of the cytoplasm. (see also labelled image)

The haploid pronuclei of the male (spermatozoa) and female (oocyte) have not yet combined to form a single nucleus.

The polar bodies can be seen at the edge of the cytoplasm (at 3 o'clock position). These exclusion bodies contain the additional oocyte DNA produced in meiosis.

The zona pellucida forms the thick clear layer that surrounds the cell.

At this stage in vivo:

  • there would still be granulosa cells and spermatozoa attached to the zone pellucida.
  • the zygote floats freely within the uterine tube.
  • The cell is preparing for the first mitotic division.


Links: Carnegie stage 1 | Image - Early zygote | Image - Early zygote labelled | Fertilization | Zygote


About Carnegie Stages 1

Facts: Week 1, size 0.1 - 0.15 mm (100 - 150 microns)

Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida



Cite this page: Hill, M.A. (2020, November 23) Embryology Early zygote.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Early_zygote.jpg

What Links Here?
© Dr Mark Hill 2020, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

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Date/TimeThumbnailDimensionsUserComment
current12:45, 10 March 2012Thumbnail for version as of 12:45, 10 March 2012500 × 441 (23 KB)Z8600021 (talk | contribs)
17:40, 27 July 2009Thumbnail for version as of 17:40, 27 July 2009216 × 191 (4 KB)MarkHill (talk | contribs)About Carnegie Stages 1 Facts: Week 1, size 0.1-0.15 mm Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/wwwhuman/Stages/Stage1.htm

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