Carnegie stage 2: Difference between revisions

Revision as of 06:48, 25 October 2011

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, G₂, 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


Human Embryo (day 2)	Human Embryo (day 3)

See also Human oocyte to blastocyst

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 24) Embryology Carnegie stage 2. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_2

What Links Here?

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 '''Features:''' [[Z#zona pellucida|zona pellucida]], [[B#blastomeres|blastomeres]]
-'''Links:''' [[Week 1]] | [[Blastocyst]] | [[Lecture - Week 1 and 2 Development|Lecture]] | [[BGDA_Practical_-_Fertilization_to_Implantation|Medicine Practical]] | [[2011_Lab_2|Science Practical]] | [[Carnegie_stage_3|Stage 3]]
+'''Links:''' [[Week 1]] | [[Blastocyst]] | [[Cell Division - Mitosis|Mitosis]] | [[Lecture - Week 1 and 2 Development|Lecture]] | [[BGDA_Practical_-_Fertilization_to_Implantation|Medicine Practical]] | [[2011_Lab_2|Science Practical]] | [[Carnegie_stage_3|Stage 3]]
+|}
 {{Carnegie stages}}