File:Early zygote.jpg
Early_zygote.jpg (500 × 441 pixels, file size: 23 KB, MIME type: image/jpeg)
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. (2024, May 21) Embryology Early zygote.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Early_zygote.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 | |
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current | 11:45, 10 March 2012 | 500 × 441 (23 KB) | Z8600021 (talk | contribs) | ||
16:40, 27 July 2009 | 216 × 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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- 2009 Lab 12
- 2009 Lecture 2
- 2009 Lecture 3
- 2010 BGD Lecture - Development of the Embryo/Fetus 1
- 2010 BGD Lecture - Development of the Embryo/Fetus 2
- 2010 BGD Practical 3 - Early Cell Division
- 2010 BGD Practical 3 - Week 3 Summary
- 2010 BGD Practical 6 - Week 8
- 2010 BGD Tutorial - Applied Embryology and Teratology
- 2010 Foundations Lecture - Introduction to Human Development
- 2010 Foundations Practical - Introduction to Human Development
- 2010 Lab 2
- 2010 Lecture 2
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- 2010 Lecture 6
- 2011 Group Project 11
- ANAT2341Embryology Image Tutorial
- ANAT2341 Embryology 2015
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- ANAT2341 Lab 1 - Fertilization
- ANAT2341 Lab 2 - Week 1
- ANZACA Meeting 2012 - Embryology
- Abnormal Development - Environmental
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- Abnormal Development - Teratogens
- Abnormal Development - Twinning
- BGDA Lecture - Development of the Embryo/Fetus 2
- BGDA Practical 3 - Fertilization
- BGDA Practical 3 - Week 1 Summary
- BGDA Practical 3 - Week 2 Summary
- BGDA Practical 3 - Week 3 Summary
- BGDA Practical 7 - Week 8
- BGD Tutorial - Applied Embryology and Teratology
- Carnegie stage 1
- Editing Basics
- Embryology Image Tutorial
- Embryonic Development
- Fertilization
- Foundations Lecture - Introduction to Human Development
- Foundations Practical - Critical Periods
- Foundations Practical - Introduction to Human Development
- Foundations Practical - Week 1 and 2
- Human Abnormal Development
- Lecture - 2012 Course Introduction
- Lecture - 2013 Course Introduction
- Lecture - Ectoderm Development
- Lecture - Fetal Development
- Lecture - Week 1 and 2 Development
- Placenta - Membranes
- Pre-Medicine Program - Embryology
- Test Student 2010
- Timeline human development
- UNSW Learning and Teaching Seminar 2012
- Week 1
- Week 1 - Abnormalities
- Week 2
- Zona pellucida
- Talk:2010 BGD Lecture - Development of the Embryo/Fetus 2
- Talk:Timeline human development
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