Carnegie stage 2: Difference between revisions
From Embryology
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==Introduction== | ==Introduction== | ||
First cell divisions of the zygote forming initially 2 blastomeres and continuing to divide to form the [[M#morula|morula]]. This early mitosis is a unique cell cycle ( | First cell divisions of the zygote forming initially 2 blastomeres and continuing to divide to form the [[M#morula|morula]]. This early mitosis is a unique embryonic cell cycle (M, S, M phases) compared to adult (M,G<sub>1</sub>, S, G<sub>2</sub>m M phase). With virtually no G<sub>1</sub> or G<sub>2</sub> phases this results in a reduction in cytoplasmic volume of each daughter cell with each cell division. | ||
'''Facts:''' Week 1, 2-3 days, size 0.1-0.2 mm | '''Facts:''' Week 1, 2-3 days, size 0.1-0.2 mm | ||
Revision as of 15:57, 1 March 2010
Introduction
First cell divisions of the zygote forming initially 2 blastomeres and continuing to divide to form the morula. This early mitosis is a unique embryonic cell cycle (M, S, M phases) compared to adult (M,G1, S, G2m M phase). With virtually no G1 or G2 phases this results in a reduction in cytoplasmic volume of each daughter cell with each cell division.
Facts: Week 1, 2-3 days, size 0.1-0.2 mm
Features: zona pellucida, blastomeres
- 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 26) Embryology Carnegie stage 2. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_2
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
