File:Early zygote.jpg: Difference between revisions
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==Early Zygote== | ==Early Zygote== | ||
This is described as an early human 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 | |||
At this stage ''in vivo'': | At this stage ''in vivo'': |
Revision as of 07:11, 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
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
Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/wwwhuman/Stages/Stage1.htm
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
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- 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
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- BGDA Lecture - Development of the Embryo/Fetus 2
- BGDA Practical 3 - Fertilization
- BGDA Practical 3 - Week 1 Summary
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- BGDA Practical 7 - Week 8
- BGD Tutorial - Applied Embryology and Teratology
- Carnegie stage 1
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- Embryonic Development
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- Foundations Lecture - Introduction to Human Development
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- Human Abnormal Development
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- Lecture - 2013 Course Introduction
- Lecture - Ectoderm Development
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- Placenta - Membranes
- Pre-Medicine Program - Embryology
- Test Student 2010
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- UNSW Learning and Teaching Seminar 2012
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- Talk:2010 BGD Lecture - Development of the Embryo/Fetus 2
- Talk:Timeline human development
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