Paper - Two choice human embryos at Streeter's horizons XI and XIV

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Wells LJ. and Kaiser IH. Two choice human embryos at Streeter's horizons XI and XIV. (1959) Obstet Gynecol., 14: 411-6 PMID 13843903

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This historic 1959 paper by Wells and Kaiser describes two human embryos of Carnegie stage 11 and Carnegie stage 14. The online version currently contains just an abstract. George Streeter


Modern Notes:

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


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
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Pages where the terms "Historic Textbook" and "Historic Embryology" appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms and interpretations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Two Choice Human Embryos at Streeter’s Horizons XI and XIV

Lemen J. Wells, Ph.D., And Irwin H. Kaiser, M.D., Ph.D.

From the Departments of Anatomy and Obstetrics and Gynecology, University of Minnesota, Minneapolis, Minn.


  • Aided by grants from the National Institutes of Health (A-1244) and from the Medical Research Fund of the Graduate School of the University of Minnesota.

Introduction

Human embryologic material in superb condition is still relatively rare. The two specimens to be presented here were obtained by hysterectomy and were fixed while still alive by opening the chorionic sacs under 10 per cent formalin. Their anatomic relations to the embryonic membranes and to the deciduas were deliberately retained.


The ventral views herein illustrated are desirable supplements to the lateral and dorsal views that are usually presented in textbooks of human embryology. Four other factors contributed, however, to our decision to present ventral views: both implantations were posterior (dorsal); the capsular deciduas and chorionic sacs were opened anteriorly (ventrally); the body stalks were not severed; the specimens are being used as excellent additions to the demonstrations for a medical course in human embryology.

Case 1

Wells1959 fig01.jpg

Fig. 1. Case I. In this block of endometriurn from the posterior uterine wall, the embryonic membranes and embryo have been exposed by incision of the decidua capsularis and chorion and reflection of the flap (hinged upward in drawing).


Case 2

Wells1959 fig04.jpg

Fig. 4. Case 2. In this block of endometrium from the posterior uterine wall, the embryonic membranes and embryo have been exposed by a large window mode in the deciduo copsularis and chorion.




Cite this page: Hill, M.A. (2019, October 22) Embryology Paper - Two choice human embryos at Streeter's horizons XI and XIV. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_Two_choice_human_embryos_at_Streeter%27s_horizons_XI_and_XIV

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