Embryology History - Chester Heuser: Difference between revisions

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About 6 early embryos, cut by Dr. Heuser, were added to the available sectioned material. At the instance of Dr. G. W. Bartelmez, about 12 early human embryos, obtained and prepared by him personally during his long connection with the University of Chicago, were donated by the Department of Anatomy of that institution. These embryos, some of which are of presomite age, constitute an important addition to the resources of the Department of Embryology. Several of them are superbly preserved.
About 6 early embryos, cut by Dr. Heuser, were added to the available sectioned material. At the instance of Dr. G. W. Bartelmez, about 12 early human embryos, obtained and prepared by him personally during his long connection with the University of Chicago, were donated by the Department of Anatomy of that institution. These embryos, some of which are of presomite age, constitute an important addition to the resources of the Department of Embryology. Several of them are superbly preserved.
===Horizons of Human Development===
When Dr. George L. Streeter died in 1948, he left unfinished the last five stages of his great series, "Developmental Horizons in Human Embryos." All that was available, with which his colleagues could complete the unfinished portion, was the illustrations and some bundles of notes. Dr. Chester H. Heuser, aided by Dr. Corner, has painstakingly organized and expanded these notes into an article of about the same size and almost the same degree of completeness as those which Dr. Streeter published. The period of development from Streeter's stage xi (23 to 25 days) to the end of the embryonic period, his stage xxiii (46 to 48 days), has now been entirely covered.
As each installment of this series was printed, 500 copies were kept unbound in sheets. With the completion of horizons xi to xxiii the sheets were bound up into a special volume and provided with an explanatory preface by Dr. Corner. This book, entitled Developmental Horizons in Human Embryos: Age Groups XI to XXIII, and designated as Embryology Reprint Volume II, is available through the Office of Publications of the Carnegie Institution of Washington.


==References==
==References==

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Introduction

Carnegie Institution of Washington Year Book 1952

Dr. Chester H. Heuser, who retired on August 31, 1950 after twenty-nine years of continuous service, was appointed a Research Associate, Department Of Embryology Baltimore. During the summer of 1951 he spent two months at the Department of Embryology working on human embryos in preparation for his proposed descriptive catalogue of the earlier stages (i to x) which were not included in the series "Developmental Horizons in Human Embryos" begun by the late Dr. George L. Streeter.

Department Of Embryology Baltimore, Maryland George W. Corner, Director[1]

Early Human Embryos - Morphology

During his stay at the laboratory in July and August 1951 Dr. Chester H. Heuser began intensive work on the earliest embryos in the Carnegie Collection, that is to say those of horizons i to x of the Streeter classification, covering the age span from ovulation to 24 days. The collection now includes 65 specimens within this age span, a large proportion of which were obtained by Dr. Arthur T. Hertig and Dr. John Rock. About 35 of these are normal and well preserved and are therefore suitable for inclusion in the Horizons series which Dr. Heuser is preparing. As reported in recent Year Books, several extremely early embryos have recently been added. From the standpoint of the comparative embryologist a most valuable part of the series is that from 7 to 18 days, when the embryo is securing its attachment to the mother and when it passes through those primitive steps of organization which are common to all vertebrates, including the processes of gastrulation, formation of the amniotic duct, of the allantois, the notochord and chorda canal, etc. Upon such basal embryonic processes the biologist must depend as part of his evidence for determining evolutionary relationships in the animal kingdom. The relatively large number of specimens available in the Collection makes it possible to follow them in man more closely than before.


About 6 early embryos, cut by Dr. Heuser, were added to the available sectioned material. At the instance of Dr. G. W. Bartelmez, about 12 early human embryos, obtained and prepared by him personally during his long connection with the University of Chicago, were donated by the Department of Anatomy of that institution. These embryos, some of which are of presomite age, constitute an important addition to the resources of the Department of Embryology. Several of them are superbly preserved.

Horizons of Human Development

When Dr. George L. Streeter died in 1948, he left unfinished the last five stages of his great series, "Developmental Horizons in Human Embryos." All that was available, with which his colleagues could complete the unfinished portion, was the illustrations and some bundles of notes. Dr. Chester H. Heuser, aided by Dr. Corner, has painstakingly organized and expanded these notes into an article of about the same size and almost the same degree of completeness as those which Dr. Streeter published. The period of development from Streeter's stage xi (23 to 25 days) to the end of the embryonic period, his stage xxiii (46 to 48 days), has now been entirely covered.


As each installment of this series was printed, 500 copies were kept unbound in sheets. With the completion of horizons xi to xxiii the sheets were bound up into a special volume and provided with an explanatory preface by Dr. Corner. This book, entitled Developmental Horizons in Human Embryos: Age Groups XI to XXIII, and designated as Embryology Reprint Volume II, is available through the Office of Publications of the Carnegie Institution of Washington.

References

  1. Carnegie Institution of Washington Year Book No. 51. Carnegie Institution Of Washington Washington, D. C. 1952

Selected References

Heuser, C. H. 1930. A human embryo with 14 pairs of somites. Carnegie Instn. Wash. Publ. 414, Contrib. Embryol., 22, 135-153.

Heuser, C. H. 1932a. An intrachorionic mesothelial membrane in young stages of the monkey (Macacus rhesus). Anat. Rec, 52, Suppl., 15-16.

Heuser, C. H. 1932b. A presomite human embryo with a definite chorda canal. Carnegie Instn. Wash. Publ. 433, Contrib. Embryol., 23, 251-267.

Heuser, C. H. 1954. Monozygotic twin human embryos with an estimated ovulation age of 17 days. Anat. Rec, 118, 310.

Heuser, C. H. 1956. A human ovum with an estimated ovulation age of about nine days. Anat. Rec, 124, 459.

Heuser, C H , and Corner, G. W 1957 Developmental horizons in human embryos. Description of age group X, 4 to 12 somites Carnegie Instn Wash Publ 611, Contrib. Embryol., 36, 29-39.

Heuser, C. H., Rock, J., and Hertig, A. T. 1945. Two human embryos showing early stages of the definitive yolk sac. Carnegie Instn. Wash. Publ. 557, Contrib. Embryol., 31, 85-99.

Heuser, C.H., and Streeter, G.L. 1929. Early stages in the development of pig embryos, from the period of initial cleavage to the time of the appearance of limb-buds. Carnegie Instn. Wash. Publ. 394, Contrib. Embryol., 20, 1-29.

Heuser, C. H., and Streeter, G. L 1941. Development of the macaque embryo. Carnegie Instn. Wash. Publ. 525, Contrib. Embryol., 29, 15-55.

Heard, O. O. 1957. Methods used by C. H. Heuser in preparing and sectioning early embryos. Carnegie Instn. Wash. Publ. 611, Contrib. Embryol., 36, 1-18.



Cite this page: Hill, M.A. (2024, March 28) Embryology Embryology History - Chester Heuser. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Embryology_History_-_Chester_Heuser

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