Carnegie stage 1: Difference between revisions

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:'''Links:''' [[Week 1]] | [[Zygote]] | [[Zona pellucida|Zona pellucida]] | [[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_2|Stage 2]]
:'''Links:''' [[Week 1]] | [[Zygote]] | [[Zona pellucida|Zona pellucida]] | [[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_2|Stage 2]]
|}


{{Carnegie stages}}
{{Carnegie stages}}


==Additional Images==
==Carnegie stage 1==


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<gallery>

Revision as of 06:53, 25 October 2011

Introduction

Early zygote.jpg

Human early zygote showing pronuclei

The early human zygote where the male and female pronuclei (centre of image) have not yet combined to form the single zygote nucleus. These pronuclei contain all the nuclear DNA (genes) and are the nuclei from the sperm and 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 (edge of image) forms a specialised thick extracellular matrix layer around both the egg and the developing conceptus for the first week.

Facts: Week 1, size 0.1-0.15 mm

Features: zygote, fertilized oocyte, pronuclei, polar bodies, zona pellucida


Links: Week 1 | Zygote | Zona pellucida | Mitosis | Lecture | Medicine Practical | Science Practical | Stage 2
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

Carnegie stage 1

  • Early zygote labelled

    Early zygote labelled

  • Stage 1 size with ruler

    Stage 1 size with ruler

  • Human zygote two pronuclei[1]

    Human zygote two pronuclei[1]

  • Human zygote two pronuclei[1]

    Human zygote two pronuclei[1]

  • Human zygote two pronuclei[1]

    Human zygote two pronuclei[1]

  • Human zygote two pronuclei (labelled)[1]

    Human zygote two pronuclei (labelled)[1]

  • Human oocyte to blastocyst[2]

    Human oocyte to blastocyst[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 <pubmed>20579351</pubmed>| Reprod Biol Endocrinol.
  2. ↑ <pubmed>19924284</pubmed>
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 25) Embryology Carnegie stage 1. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_1

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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