Difference between revisions of "Category:Carnegie Embryo 75"

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Latest revision as of 14:40, 25 May 2018

This Embryology category shows pages and images that relate to the Carnegie Collection Embryo No. 75. This embryo was classified as Stage 23.

Stage 23 Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Carnegie Embryos | Madrid Embryos | Category:Carnegie Stage 23 | Next Fetal Development
  Historic Papers: 1954 Stage 19-23



Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
75 E,30 Good Alc. P Sag. 50 Coch. 57 M 1897

References

Streeter GL. Factors involved in the formation of the filum terminale. (1919) Amer. J Anat. 22:1-11.

Kunitomo K. The development and reduction of the tail and of the caudal end of the spinal cord (1920) Contrib. Embryol., Carnegie Inst. Wash. Publ. 272, 9: 163-198.


Carnegie Collection - Stage 23 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
45 E,28 Ch, 40x35x20 Poor ? P Coronal/Transverse 50 Al. coch. 51.5 Female 1895
75 E,30 Good Alc. P Sagittal 50 Coch. 57 Male 1897
86 E,30 Good ? ? Coronal 50 Coch. Male 1897 May be an early fetus
100 E,27 Poor ? P Sagittal 50 Al. coch. 57.5 ? 1897
108 E, 28 (est.) Poor Piurosulph. acid P Sagittal 45 Borax carm. 52.5 Male 1897
227 E30 Ch, 60x40x20 Poor Formol P Sagittal 50, 100 Al. coch. 54 Female 1903
417 E,32 Ch., 0x60x40 Good Formol P Transverse 100 Al. coch. 58.5 Female 1907
756A E, 27 Ch. 60x45x35 Good Formol P Coronal 50 Al. coch. 56 Male 1913
882 E , 28 Ch, 80x80x40 Good Formol P Transverse 40 Multiple 53 8 1913
950 E, 29 Good Formol P Transverse 50 Al. coch. 54 Male 1914
1199 E.,26 Ch,, 60x40x30 Good Formol C Coronal 40 (Stain - Haematoxylin Eosin) aur , or. G. 54.5 Male 1915
1535 E , 28 Ch. 50x45 x15 Poor Formol P Transverse 40 (Stain - Haematoxylin Eosin) 495 Female 1916
1945 E., 27.3 Ch., 83x53x22.5 Good Formol C-P Transverse 50 (Stain - Haematoxylin Eosin) aur., or. G. 48 Male 1917
2561 E., 27 .5 Good Formol C-P Transverse 25 (Stain - Haematoxylin Eosin) aur., or. G. 48 .5 Male 1919
4205 E., 29.5 Good Bouin P Transverse 50 A1. coch. 55.5 Female 1923
4289 E., 32.2 Ch., 52x35x25 Good Formol P Transverse 15, 20 A1. coch., Mallory 59 Female 1923
4525 E., 30 Good Formol P Sagittal 20 (Stain - Haematoxylin Eosin) 57 Male 1924
4570 E, 30.7 Ch., 52X50X28 Exc. Bouin P Transverse. 15 (Stain - Haematoxylin Eosin) , phlox. 55 Male 1924
5154 E.,32 Good Bouin P Transverse 20 (Stain - Haematoxylin Eosin) 59.5 Male 1926
5422 E., 27 Good Formol P Sagittal 40 (Stain - Haematoxylin Eosin) 52.5 Female 1927
5621A E., 27.5 Good Formol P Transverse 20 (Stain - Haematoxylin Eosin) 52.5 Male 1927 Other twin has spina bifida and fused kidneys
5725 E, 23 Good Formol P Coronal 25 (Stain - Haematoxylin Eosin) aur., or. G. 50.5 Female 1928
6573 E,31.5 Good Bouin C Transverse 20 (Stain - Haematoxylin Eosin) 58.5 Female 1932
7425 E, 27 Exc. Bouin C-P Coronal 20 (Stain - Haematoxylin Eosin) 47 Female 1937 Ag added
9226 E, 31 Exc. Formol C—P Transverse 12 Azan ? Female 1954
D.122 E, 27 Exc. ? ? Transverse 19 Ag ? ? 1976 Yntema and Truex
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.

Embryo No. 75, 30 mm Crown-Rump Length

Kunitomo K. The development and reduction of the tail and of the caudal end of the spinal cord (1920) Contrib. Embryol., Carnegie Inst. Wash. Publ. 272, 9: 163-198.

At the caudal end of embryo No. 75 there is a small papilliform tail containing a group of cells which merge into the wall of the spinal canal, as shown in figure 43. The spinal cord narrows suddenly at the mid-level of the thirty-second vertebra, and its atrophic portion is further constricted at a level between the thirty-third and thirty-fourth vertebrae, as indicated in figure 43 (constrict). The part below this constriction is the primordium of the coccygeal medullary vestige and the upper part is destined in a later stage to undergo retrogression, leaving a small cell-sac as a second coccygeal medullary vestige. There are two large folds on the ventral wall of the spinal cord at a level with the thirty-first vertebra. In the median plane they are triangular in shape and consist of ependymal and mesenchymal cells that have been inverted, together with the wall. A large diverticulum lies between these two folds. The space below the folds probably represents the primordium of the ventriculus terminalis. Only the branches of the anterior spinal artery enter into these folds. There are 34 cartilaginous vertebrae, and at thirty-first and thirty-second vertebrae the column presents a typical curve. The chorda dorsalis shows a spindle-shaped swelling between the vertebrae, and is much convoluted at the caudal end, as seen in figure 43. There are 31 spinal ganglia; the nerves of the last pair are quite slender.



Cite this page: Hill, M.A. (2019, July 18) Embryology Carnegie Embryo 75. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Category:Carnegie_Embryo_75

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