File:Early zygote labelled.jpg: Difference between revisions

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* the zygote floats freely within the uterine tube.
* the zygote floats freely within the uterine tube.
* The cell is preparing for the first mitotic division.
* The cell is preparing for the first mitotic division.


{{Zygote image links}}
{{Zygote image links}}

Revision as of 20:24, 6 April 2014

Early Zygote

This is described as an early human zygote due to the presence of the 2 pronuclei (male and female) in the centre of the cytoplasm.

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.


Zygote Image Links: Image - Early zygote | Image - Early zygote labelled | Image - zygote 1 | Image - zygote 2 | Image - zygote 3 | Image - zygote 2 labeled | Fertilization | Zygote | Carnegie stage 1 | Category: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



Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/wwwhuman/Stages/Stage1.htm


Cite this page: Hill, M.A. (2024, March 28) Embryology Early zygote labelled.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Early_zygote_labelled.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

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Date/TimeThumbnailDimensionsUserComment
current12:47, 10 March 2012Thumbnail for version as of 12:47, 10 March 2012500 × 441 (29 KB)Z8600021 (talk | contribs)increase image size
14:28, 20 July 2010Thumbnail for version as of 14:28, 20 July 2010216 × 191 (8 KB)S8600021 (talk | contribs)==Early Zygote (labelled)== About Carnegie Stages 1 Facts: Week 1, size 0.1-0.15 mm Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida Related Images: Early zygote | Image Source: UNSW Embryology ht