Carnegie stage 1: Difference between revisions
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
Features: [[Z#zygote|zygote]], fertilized oocyte, [[P#pronuclei|pronuclei]], [[P#polar bodies|polar bodies]], [[Z#zona pellucida|zona pellucida]] | Features: [[Z#zygote|zygote]], fertilized oocyte, [[P#pronuclei|pronuclei]], [[P#polar bodies|polar bodies]], [[Z#zona pellucida|zona pellucida]] | ||
This image shows an early human zygote where the male and female pronuclei have not yet combined to form the single zygote nucleus. | This image shows an early human zygote where the male and female pronuclei (centre of image) have not yet combined to form the single zygote nucleus. | ||
Two of the egg's polar bodies (right, 3 o'clock position) are shown at the edge of the egg cytoplasm. These polar bodies contain the excess DNA from the meiotic divisions of the egg. | Two of the egg's polar bodies (right, 3 o'clock position of image) are shown at the edge of the egg cytoplasm. These polar bodies contain the excess DNA from the meiotic divisions of the egg. | ||
The zona pellucida | The zona pellucida (edge of image) forms a specialised thick extracellular matrix layer around both the egg and the developing conceptus for the first week. | ||
==Additional Images== | ==Additional Images== | ||
Revision as of 08:07, 5 April 2010
Facts: Week 1, size 0.1-0.15 mm
Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida
This image shows an early human zygote where the male and female pronuclei (centre of image) have not yet combined to form the single zygote nucleus.
Two of the egg's polar bodies (right, 3 o'clock position of image) are shown at the edge of the egg cytoplasm. These polar bodies contain the excess DNA from the meiotic divisions of the egg.
The zona pellucida (edge of image) forms a specialised thick extracellular matrix layer around both the egg and the developing conceptus for the first week.
Additional Images
Stage1 size with ruler
- Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline
Cite this page: Hill, M.A. (2024, April 23) Embryology Carnegie stage 1. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_1
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
