Category:Pfannenstiel III

From Embryology

This Embryology category shows pages and media related to the historic human embryo Pfannenstiel III, named after Professor Pfannenstiel of Griefswald.

Corresponding to Carnegie stage 11 development in week 4, 23 - 26 days, GA week 6-7. This embryo stage has a crown rump length (CRL) of 2.5 - 4.5 mm and somite number 13 - 20 pairs.

Stage 11 Links: Week 4 | Somitogenesis | Placodes | Lecture - Mesoderm | Lecture - Ectoderm | Lecture - Early Vascular | Science Practical | Carnegie Embryos | Category:Carnegie Stage 11 | Next Stage 12
  Historic Papers: 1908 | 1920 | 1923 somites 20 | 1927 Heart | 1928 somites 17-23 | 1959 stage 11 | 1964 dysraphism



Pfannenstiel III (14 somites) Carnegie stage 11

Described by Keibel F., and Elze, C. 1908. Normentafeln zur Entwicklungsgeschichte der Wirbeltiere. (Normal Plates for Evolution of Vertebrates) 8. Heft Normentafeln zur Entwicklungsgeschichte des Menschen. (Vol. 8. Normal Plates of the Development of the Human Embryo) Fisher, Jena., Germany. Shown as Embryo No.6 (Plate 1 fig. Vr. and Plate 2 fig. Vv.).

Described also by Low, A. in 1908.[1]

  • Plastic models available of - external form, central nervous system, digestive system, heart and large vessels.
  • two pharyngeal arches, clearly marked.
  • neural lips are closed rostrally as far as the collicular region.


Described also by Keibel F. in the textbook Keibel F. The Interdependence of the Various Developmental Processes in Keibel F. and Mall FP. Manual of Human Embryology II. (1912) J. B. Lippincott Company, Philadelphia. Chapter XX. The Interdependence of the Various Developmental Processes



Human Embryo Pfannenstiel III
Collection of Prof. Pfannenstiel, Giessen. Carnegie stage 11
Desig. Size Age Body form Primitive streak Primitive segments Chorda Nervous system Eye Ear Nose Hypophysis Mouth Digestive trac, liver and pancreas Branchial pouches, threoid thymus, trachea and lungs Urogenital system Heart and vessels Integument Skeleton Extremities Amnion Allantois Remarks
6 Pfannenstiel III Fig. Vr and Vv. Textfig. 6a to 6w. Gr. L. about 2.6 mm. Embryo bent over the ventral surface and slightly bent spirally. Tail bud, on its ventral side doubtful remains of primitive streak. 13-14 pairs of primitive segments. Chorda emerging from entoderm, Cranially is still entoderm, caudally it is probably primarily independent of the entoderm and in this region it is no longer included in the entoderm. In brain region medullary canal is open to caudal to the region of the optic vesicle, similarly the caudal end. Anlagen of neuromeres already present. Primary optic vesicles. They are close to the ectoderm; in their region the medullary canal is wide open. Anlage of auditory vesicle recognizable as a thickened and at first but little depressed plate of ectoderm. Hypophysis just indicated. Primary pharyngeal membrane still closed. Oral sinus. Wide hepatic bay just cranial to the intestinal umbilicus. No trace yet of hepatic trabeculae. The two first branchial pouches reach the ectoderm, the 3rd is formed. Quite rudimentary "pronephric anlage" in 8th, 9th and 10 pairs of primitive segments. No trace yet of a Wolffian duct. Segmental vesicles in the 11th, 12th and 13th pairs of primitive segments. Heart S-shaped. Posterior mesocardium through a few sections. Aorta paired throughout. Allantoic duct Extirpation of uterus on account of carcinoma.
Remarks - Fixation formalin Muller's fluid. Stain Paracarmine. Sections 10 μ. Recent mitoses. Septum transverse. No ventral connection between pericardial and peritoneal cavities.
Reference: Keibel F. and Elze C. Normal Plates of the Development of the Human Embryo (Homo sapiens). (1908) Vol. 8 in series by Keibel F. Normal plates of the development of vertebrates (Normentafeln zur Entwicklungsgeschichte der Wirbelthiere) Fisher, Jena., Germany.
Cited in: 1912 Human Embryology and

Low A. Description of a human embryo of 13-14 mesodermic somites. (1908) J Anat Physiol. 42(3): 237-51. PMID 17232769 | PMC1289161

1908 Embryo Tables: Klb (stage 10) | Pfannenstiel III (stage 11) | Meyer 300 (stage 12) | Strahl 4mm (stage 13) | Hertwig G31 (stage 14)


Fig. 600 Reconstruction of the caudal end of the body of Embryo Pfannenstiel III 2.6 mm greatest length and with 13-14 pairs of primitive segments. X 50.

References

  1. Low A. Description of a human embryo of 13-14 mesodermic somites. (1908) J Anat Physiol. 42(3): 237-51. PMID 17232769 | PMC1289161


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Carnegie Collection - Stage 11 
Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
12 14 E, 2.1 Ch, 13 Poor P Transverse 10 Al. carm. 1893
164 18 E, 3.5 Ch, 14 Good Formol P Transverse 20 Al. carm. 1913
318 13/14 E, 2.5 Ch, 16 Good P Transverse 25 Al. carm. 1905
470 17 E, 4.3 Ch, 16 Good Formol P Transverse 10 Al. carm. . 1910
779 14 E, 2.75 Good C Transverse 15 Al. coch. 1913 Dysraphism. Noted by Dekaban (1964)[1]
1182b E, 3 Ch, 15x12x5 Good Formol ? Transverse 20 Al. carm. 1915
2053 20 E, 3.1 Ch, 12 Exc. Formol P Transverse 10 Al. coch. 1918 Most advanced in group. Ag added to slide 2
Monographs by Davis (1923)[2] and Congdon (1922)[3]
4315 17 E, 4.7 Ch, 23x10.4X11 Excellent ? C-P Transverse 10 I.H. & E. 1923 Univ. Chicago No. 951. Wen (1928)[4]
4529 14 E, 2.4 Ch, 21 Excellent Formol P Transverse 10 Al. coch, or. G. 1924 Heuser (1930)[5]
4783 13 E, 2.3 Fair ? ? Transverse 5 I.H. 1924 Wallin (1913)[6]
4877 13 E, 2 Ch, 15 Good Formol P Transverse 15 Al. coch. 1925
5072 17 E, 3 Good Formol P Transverse 10 (Stain - Haematoxylin Eosin) 1925 Tubal Type specimen. Atwell (1930)[7]
6050 19/21 E.,3 Ch, 10 Good Formol C-P Coronal 10 Al. coch. 1930 Advanced
6344 13 E, 2.5 Ch, 17 Excellent Formol C-P Transverse 6 Al. coch. 1931 Least advanced in group
6784 17 E, 5 Ch, 16 Excellent Formol C-P Transverse 6 I.H, or. G. 1933
7358 16 E, ? Ch, 15 Poor Alc, formol p Oblique 25 (Stain - Haematoxylin Eosin) 1936
7611 16 E., 2.4 Ch., 12 Excellent Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1938
7665 19 E., 4.36 Excellent ? C-P Transverse 6 1939 Univ. Chicago No. H 1516
7702 17 E, 3.7 Ch., 14 Good Formol C-P Transverse 10 Al. coch. 1940 Returned to B M Patten
7851 13 E., 4.3 Ch, 18 Excellent Formol C-P Transverse 8 (Stain - Haematoxylin Eosin) 1940 Slightly injured
8005 16/17 E, 3 Excellent Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1942 Tubal
8116 17 E, 14 Ch.. 17 Good Formol p Sagittal 8 Azan 1953
8962 15 E, 1.55 Good ? * Sagittal ? ? 1952 Tubal Univ. Chicago No. H 810
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)
  •  ? - unknown or not determined.
References
  1. Dekaban AS. and Bartelmez GW. Complete Dysraphism in 14 Somite Human Embryo. (1964) A Contribution To Normal And Abnormal Morphogenesis. Am. J. Anat. 115: 27-38. PMID 14199785
  2. Davis CL. Description of a human embryo having twenty paired somites. (1923) Carnegie Instn. Wash. Publ. 332, Contrib. Embryol., 15: 1-51.
  3. Congdon ED. Transformation of the aortic-arch system during the development of the human embryo. (1922) Contrib. Embryol., Carnegie Inst. Wash. Publ 277, 14:47-110.
  4. Wen IC. The anatomy of human embryos with seventeen to twenty-three pairs of somites (1928) J. Comp. Neural., 45: 301-376.
  5. Heuser CH. A human embryo with 14 pairs of somites. (1930) Carnegie Instn. Wash. Publ. 414, Contrib. Embryol., Carnegie Inst. Wash. 22:135-153.
  6. Wallin IE. A human embryo of thirteen somites. (1913) Amer. J Anat. 15(3): 319-331.
  7. Atwell WJ. A human embryo with seventeen pairs of somites. (1930) Contrib. Embryol., Carnegie Inst. Wash. Publ. 407, 21: 1-24.

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Media in category ‘Pfannenstiel III’

The following 19 files are in this category, out of 19 total.