2009 Group Project 4: Difference between revisions
From Embryology
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===Timeline of Development=== | ===Timeline of Development=== | ||
===Staging=== | ===Staging=== | ||
{| border='1px' | |||
|+Mouse embryonic stages of development from fertilization to zona free blastocyst (stages 1 to 5) | |||
!Theiler Stage !!Embryonic age in Days Post Coitum (dpc)!!Stage characteristic !!Cell characteristics !!Zona pellucida !!Location/ changes in site !! | |||
|- | |||
|1 | |||
|0-0.9 | |||
(range 0-0.25) | |||
|One-celled embryo (fertilized) | |||
|One cell | |||
|Present | |||
| | |||
|- | |||
|2 | |||
|1 | |||
(range 1-2.5) | |||
|Dividing egg | |||
|2-4 cells | |||
- 1st cleavage after 24hrs | |||
|Present | |||
| | |||
|- | |||
|3 | |||
|2 | |||
(range 1-3.5) | |||
|Morula (early to fully compacted) | |||
|4-16 cells | |||
|Present | |||
|Oviduct. Usually near utero-tubal junction. | |||
|- | |||
|4 | |||
|3 | |||
(range 2-4) | |||
|Change from Morula to Blastocyst | |||
-Intra-cellular matrix | |||
-Blastocoelic cavity evident | |||
|16-40 compacted cells | |||
-Iinner cell mass | |||
-Outer layer of trophectoderm cells | |||
|Present | |||
|Uterine lumen | |||
|- | |||
|5 | |||
|4 | |||
(range 3-5.5) | |||
|Zona free Blastocyst | |||
| | |||
|Absent | |||
|Uterine lumen | |||
|- | |||
|} | |||
===History of Model Use=== | ===History of Model Use=== | ||
Revision as of 16:20, 22 August 2009
MOUSE
Timeline of Development
Staging
| Theiler Stage | Embryonic age in Days Post Coitum (dpc) | Stage characteristic | Cell characteristics | Zona pellucida | Location/ changes in site | |
|---|---|---|---|---|---|---|
| 1 | 0-0.9
(range 0-0.25) |
One-celled embryo (fertilized) | One cell | Present | ||
| 2 | 1
(range 1-2.5) |
Dividing egg | 2-4 cells
- 1st cleavage after 24hrs |
Present | ||
| 3 | 2
(range 1-3.5) |
Morula (early to fully compacted) | 4-16 cells | Present | Oviduct. Usually near utero-tubal junction. | |
| 4 | 3
(range 2-4) |
Change from Morula to Blastocyst
-Intra-cellular matrix -Blastocoelic cavity evident |
16-40 compacted cells
-Iinner cell mass -Outer layer of trophectoderm cells |
Present | Uterine lumen | |
| 5 | 4
(range 3-5.5) |
Zona free Blastocyst | Absent | Uterine lumen |
History of Model Use
Genetics
Current Embryology Research
ANAT2341 group projects
Project 1 - Rabbit | Project 2 - Fly | Project 3 - Zebrafish | Group Project 4 - Mouse | Project 5 - Frog | Students Page | Animal Development
