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

From Embryology
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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.
 
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  
+
The '''zona pellucida''' surrounds
  
 
At this stage ''in vivo'':
 
At this stage ''in vivo'':

Revision as of 08:11, 20 April 2012

Early Zygote

This is described as an early human zygote due to the presence of pronuclei 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 surrounds

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.


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


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


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

File history

Click on a date/time to view the file as it appeared at that time.

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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