Category:Week 4
Introduction
This Embryology category shows some key events of human development during Week 4 (Carnegie stage 11-13) of the embryonic period of the first eight weeks (weeks 1 - 8) following fertilization. This period is also considered the organogenic period, when most organs within the embryo have begun to form. There are links to more detailed descriptions which can be viewed in a week by week format, by the historic Carnegie stages or integrated into a Timeline of human development.
Online resources available include: individual images of all Carnegie stages, scanning electron micrographs of the earlier stages, cross-sections showing internal structures at mid- and late-embryonic, 3D reconstructions of internal structures, animations of processes, ultrasound scans and information about abnormalites of development.
Note that there is variability in the actual timing of specific events and at the end of this period fetal development begins.
Week: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Carnegie stage: | 1 2 3 4 | 5 6 | 7 8 9 | 10 11 12 13 | 14 15 | 16 17 | 18 19 | 20 21 22 23 |
Cite this page: Hill, M.A. (2024, June 17) Embryology Week 4. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Category:Week_4
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
Subcategories
This category has the following 95 subcategories, out of 95 total.
C
- Carnegie Embryo 1
- Carnegie Embryo 1062
- Carnegie Embryo 112
- Carnegie Embryo 116
- Carnegie Embryo 12
- Carnegie Embryo 1201
- Carnegie Embryo 148
- Carnegie Embryo 186
- Carnegie Embryo 19
- Carnegie Embryo 2053
- Carnegie Embryo 209
- Carnegie Embryo 2197
- Carnegie Embryo 239
- Carnegie Embryo 248
- Carnegie Embryo 250
- Carnegie Embryo 2795
- Carnegie Embryo 3707
- Carnegie Embryo 3709
- Carnegie Embryo 3710
- Carnegie Embryo 384
- Carnegie Embryo 391
- Carnegie Embryo 3956
- Carnegie Embryo 4046
- Carnegie Embryo 407
- Carnegie Embryo 4216
- Carnegie Embryo 4479
- Carnegie Embryo 463
- Carnegie Embryo 470
- Carnegie Embryo 4736
- Carnegie Embryo 4759
- Carnegie Embryo 4784
- Carnegie Embryo 5035
- Carnegie Embryo 5048
- Carnegie Embryo 5056
- Carnegie Embryo 5072
- Carnegie Embryo 5074
- Carnegie Embryo 5206
- Carnegie Embryo 523
- Carnegie Embryo 5300
- Carnegie Embryo 5541
- Carnegie Embryo 5682
- Carnegie Embryo 5874
- Carnegie Embryo 5923
- Carnegie Embryo 6032
- Carnegie Embryo 6050
- Carnegie Embryo 6097
- Carnegie Embryo 6144
- Carnegie Embryo 6330
- Carnegie Embryo 6344
- Carnegie Embryo 6469
- Carnegie Embryo 6473
- Carnegie Embryo 6740
- Carnegie Embryo 6937
- Carnegie Embryo 7433
- Carnegie Embryo 7611
- Carnegie Embryo 7618
- Carnegie Embryo 7665
- Carnegie Embryo 7669
- Carnegie Embryo 7702
- Carnegie Embryo 7724
- Carnegie Embryo 786
- Carnegie Embryo 7889
- Carnegie Embryo 7999
- Carnegie Embryo 8005
- Carnegie Embryo 8066
- Carnegie Embryo 808
- Carnegie Embryo 8119
- Carnegie Embryo 8147
- Carnegie Embryo 8239
- Carnegie Embryo 8244
- Carnegie Embryo 836
- Carnegie Embryo 8372
- Carnegie Embryo 8505a
- Carnegie Embryo 8505b
- Carnegie Embryo 8581
- Carnegie Embryo 8818
- Carnegie Embryo 8941
- Carnegie Embryo 8942
- Carnegie Embryo 8967
- Carnegie Embryo 8970
- Carnegie Embryo 9154
- Carnegie Embryo 9296
- Carnegie Embryo 9297
- Carnegie Embryo 963
- Carnegie Embryo 9697
- Carnegie Embryo 9870
- Carnegie Stage 10
- Carnegie Stage 11
- Carnegie Stage 12
Pages in category 'Week 4'
The following 164 pages are in this category, out of 164 total.
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B
- Template:B220849
- Template:BGDA Practical - Week 4 movies table
- Template:BGDA Practical 6 - Week 4 Interactive
- BGDA Practical 7 - Week 4
- Book - Contributions to Embryology Carnegie Institution No.112
- Book - Contributions to Embryology Carnegie Institution No.131
- Book - Contributions to Embryology Carnegie Institution No.19
- Book - Contributions to Embryology Carnegie Institution No.72
C
- Carnegie Embryo 4439
- Carnegie stage 10
- Carnegie stage 10 gallery
- Template:Carnegie stage 10 links
- Carnegie stage 11
- Template:Carnegie stage 11 links
- Carnegie stage 12
- Template:Carnegie stage 12 links
- Carnegie stage 13
- Carnegie stage 13 - serial sections
- Template:Carnegie stage 13 links
- Template:Carnegie stage table week 4
- Template:CE1
- Template:CE1062
- Template:CE1075
- Template:CE112
- Template:CE116
- Template:CE1182b
- Template:CE12
- Template:CE148
- Template:CE164
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- Template:CS10
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- Paper - A fifteen-somite human embryo
- Paper - A human embryo of seven to eight somites (1917)
- Paper - A Human Embryo of Thirteen Somites
- Paper - A Human Embryo with Seven Pairs of Somites Measuring about 2 mm in Length
- Paper - A human embryo with seventeen pairs of somites (1930)
- Paper - A well-preserved human embryo of 10 somites (1929)
- Paper - Description of a Human Embryo of 13-14 Mesodermic Somites
- Paper - Description of a Human Embryo of Twenty-three Paired Somites
- Paper - Development of the human embryo during the period of somite formation, including embryos with 2 to 16 pairs of somites
- Paper - Developmental horizons in human embryos group X
- Paper - The Disappearance of the Precervical Sinus
- Paper - The relations of the somites of the head to the brain in a human embryo of 20 paired somites
- Placenta - Stage 13
R
Media in category 'Week 4'
The following 200 files are in this category, out of 403 total.
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