Category:Carnegie Stage 21: Difference between revisions

From Embryology
mNo edit summary
mNo edit summary
Line 6: Line 6:
{{Carnegie_stages}}
{{Carnegie_stages}}


{{Carnegie Collection stage 21 table}}


{{Carnegie_stage_table_1}}
{{Carnegie_stage_table_1}}

Revision as of 22:45, 31 July 2015

This Embryology category shows pages and media related to embryonic development in week 8, 53 - 54 days, GA week 10. The embryos have a crown rump length (CRL) of 22 - 24 mm.


There is also a specific Carnegie stage 21 resource page.

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 Collection - Stage 21 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
22 E, 20 Ch, 35x30x30 Good Alc. P Transverse 50 Al. coch. 34.5 Female 1895
57 E, 23 Ch., ca. 30 Poor Alc. P Sagittal 50 Al. coch. 36 Male 1896
128 E, 20 Ch., 50x43 Good Formalin P Coronal 50 Al. coch. 33 Female 1898
229 E, 19 Poor Alc. P Sagittal 50 Al. coch. 33 Female 1903
349 E, 24 Good Zenker C Coronal 250 Unstained 36 ? 1905 Double vascular injection
455 E, 24 Ch., 42x34x20 Good Alc. P Transverse 30 (Stain - Haematoxylin Eosin) 36.5 Male 1910
632 E, 24 Ch., 60x50x30 Good Bichlor. acetic P Sagittal 40, 100, 250 Al. coch. 33 Female 1913 Injected
903C E, 23.5 Good Formalin P Transverse 40 Al. coch. 38.5 Female 1914
1008 E, 26,4 Good Formalin P Sagittal 40 Al. coch. 39 ?? 1914
1358F E, 23 Good Formalin P Sagittal 40 Al. coch. 37.5 Female 1916
2937 E,, 24.2 Good Bouin P Transverse 50 (Stain - Haematoxylin Eosin) aur., or. G. 39 Female 1920
3167 E., 24.5 Ch., 60x50x40 Poor Bichlor, acetic, formol P Transverse 20 Al. coch. 32 Male 1920
4090 E, 22.2 Ch.. 66x46x30 Good Formalin P Transverse 40 Al. coch. 30 Female 1922
4160 E,25 Poor Formalin P Sagittal 25 (Stain - Haematoxylin Eosin) 39 Male 1923 Tubal
4960 E.22 Ch,, 47x42x28 Good Formalin P Transverse 15 Al. coch., Mallory 31.5 Female 1925
5??6 E. 215 Good Formalin P Sagittal 20 (Stain - Haematoxylin Eosin) 34 Female 1927
6531 E,22 Poor Glacial acetic, C-P Transverse 10 (Stain - Haematoxylin Eosin) 31.5 Female 1931 Leitz Collection
7254 E,225 Exc Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin) 33.5 Male 1936
7592 E,22-> Exc. Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin) 36 Female 1937
7864 E., 24 Exc, Formalin C-P Frontal 20 (Stain - Haematoxylin Eosin) 32.5 Male 1941
8553 E., 22 Exc Bouin C-P Transverse 12 (Stain - Haematoxylin Eosin) 38 Female 1947
9614 E,,22 5 Exc Bouin P Coronal 10 &15 Azan ? ? 1958 Rubella. Hysterectomy
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.
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

Events

  • Mandible Development[1] :"A considerable amount of bone-formation has taken place and formed a plate on the lateral side of Meckel's cartilage; this plate is in the substance of, and is surrounded by, that mesodermal condensation which outlines the mandible and precedes the formation of bone. The plate of bone is confined to the region of what approximately corresponds to the future body of the mandible, but the mesodermal condensation can be traced further backwards, always, of course, on the lateral side of Meckel's cartilage and the associated branches of the mandibular nerve. The condensation admittedly becomes gradually much less sharply defined but is still distinguishable from the surrounding tissue. Finally, some distance beyond the limit of bone-formation, the lateral pterygoid muscle can be seen running into and out- lining the terminal part of the mesodermal condensation. This is the first indication of the condylar process in my series (P1. 1, fig. 1). Meckel's cartilage with the inferior dental and lingual nerves on its upper surface lies medial to this rudimentary condylar area and inferior to the lateral pterygoid muscle."

References

  1. ↑ <pubmed>12980883</pubmed>| PMC1273756

Media in category 'Carnegie Stage 21'

The following 80 files are in this category, out of 80 total.

Retrieved from ‘https://embryology.med.unsw.edu.au/embryology/index.php?title=Category:Carnegie_Stage_21&oldid=189394’
Powered by MediaWiki