File:Early zygote labelled.jpg
Early_zygote_labelled.jpg (500 × 441 pixels, file size: 29 KB, MIME type: image/jpeg)
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. This specialised extracellular matrix has nay roles in early development.
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 Stage 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. (2024, April 19) Embryology Early zygote labelled.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Early_zygote_labelled.jpg
- © 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/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:47, 10 March 2012 | | 500 × 441 (29 KB) | Z8600021 (talk | contribs) | increase image size |
| 13:28, 20 July 2010 |  | 216 × 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 |
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File usage
The following 14 pages use this file:
- 2015 Group Project 1
- BGDA Lecture - Development of the Embryo/Fetus 1
- Carnegie stage 1
- Embryonic Development
- Fertilization
- Lecture - 2015 Course Introduction
- Lecture - 2016 Course Introduction
- Lecture - 2017 Course Introduction
- Lecture - Fertilization
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- Zygote
- Talk:2015 Group Project 1
- Talk:Lecture - 2016 Course Introduction
