UNSW Embryology

Development History- 1914 - 17.8mm Human Embryo

© Dr Mark Hill (2008)

Acknowledgements

Introduction

Below are text and image excerpts from a historic paper on "The Anatomy of a 17.8mm Human Embryo" by Thyng, FW published originally in The American Journal of Anatomy, Vol.17, No.1 These drawings are based on studies of the Harvard Embryological Collection while he was in Minot's Lab in 1907-08.

He was also an anatomist at Northwestern University Medical School.

The embryo external appearance and dimensions suggest that it is a Carnegie stage 19 embryo (Week 7, 48 - 51 days, 16 - 18 mm).

Reference: Thyng F.W., (1914) The anatomy of a 17.8mm human embryo. American Journal of Anatomy 14, 31-113

Page Links: Introduction | 17.8mm Human Embryo | Gastrointestinal Tract | Brain and Digestive System | Central Nervous System | Central Nervous System / Cardiovascular | References | Glossary

17.8mm Human Embryo

17.8mm Human Embryo

A reproduction of figure 104, page 153 of “Laboratory Textbook of Embryology,” Charles Sedgwick Minot, edition of 1910, published by P. Blakiston’s Son and Company, Philadelphia.

Gastrointestinal Tract

Wax-plate reconstruction of the stomach, the duodenum and the pancreas.

The model is represented somewhat ventrally, from the right side A. du., antrum duodenale; C., corpus gastri; D. chol., ductus choledochus; D. cysl.. ductus cysticus; D. hep., ductus hepaticus; D. panc d., ductus pancreatis dorsalis, I) pane. ZJ., ductus pancreatis vcntralis; F., fundus gastri; Oe., oesophagus; Panr d , pancreas d o r d e ; Pam. v., pancreas ventrnle; P. py , pars pylorica pastri iH E C 839).

Brain and Digestive System

Brain and Digestive System

Reconstruction to illustrate chiefly the interior of the brain and the spinal cord; the digestive system and its appendages; thc arterial system; the left atrium and ventricle of the heart, and in part the urogenital system of a 17.8 mm. hurrian embryo (H.E.C.839).

Central Nervous System / Cardiovascular

This plate consists of two reconstructions. The upper shows a left lateral view of the brain and cervical cord with the nerves in situ, the aortic arch, and other arteries of the left side of the head and neck. It also represents the oral, nasal and pharyngeal epithelia; the left thymic and thyreoid anlagen; and illustrates in a measure the relation of the nerves and arteries to these epitheliat structures. The lower reconstruction shows the pancreas and spleen within the mesogastrium (a portion of the stomach having been removed); the left genital ridge, and the left meso- and metanephros with their ducts opening independently into the urogenital division of the cloaca (H. E. C. 839). X 11.2 diams.

Central Nervous System

Right side of the brain and the cervical cord

Reconstruction showing the right side of the brain and the cervical cord; the right cranial and cervical nerves; the internal ear, and the optic vesicle of a 17.8 mm. human embryo (H. E. C. 839). X 11.9 diams.

Left lateral view of the brain and cervical cord with the nerves in situ, the aortic arch, and other arteries of the left side of the head and neck. It also represents the oral, nasal and pharyngeal epithelia; the left thymic and thyreoid anlagen; and illustrates in a measure the relation of the nerves and arteries to these epithelial structures.

References

Minot, CS. Laboratory Textbook of Embryology, edition of 1910, published by P. Blakiston’s Son and Company, Philadelphia.

Minot, CS. 1898 On the veins of the Wolffian bodies in the pig.Proc. Bost. Soc. Nat. Hist., vol. 28, pp. 265-274, pl. 1. 1900 On a hitherto unrecognized form of blood circulation. Proc. Bost. Soc. Nat. Hist., vol. 29, pp. 185-215. 1910 Laboratory text-book of embryology. Second edition; Philadelphia.

Glossary of Terms

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Quick Links

History Pages:

Page 1 | 2 | 3 | 4 | 5

Arabian Medicine | Mediaeval | The great anatomists | The coming of Harvey | Leeuwenhoek16th and 17th Medicine | Philosopher-Scientists | 18C Anat/Physiol | Part 2 | Part 3 | 19th C Anat/ Phys Part 1 | Part 2 | Part 3 | Evolution Part 1 | Part 2 | Medicine 18th | 19th Pt1 | 19th Pt2 | Brain and Mind | Brain Structure

Development Notes ----------------- Menstrual Cycle Week 1 Week 2 Week 3 Week 4 Placenta Serial Images Genes/DNA Molecular Dev Abnormal Dev Postnatal Dev Notes Index

System Notes ----------------- Heart/Cardiovascular Respiratory Coelomic cavity Gastrointestinal Tract Head and Neck Neural Neural Crest Eye Ear Nose Endocrine Urogenital Musculoskeletal Integumentary

Movies ----------------- Embryo Growth Ultrasound Week 1 Week 2 Week 3 Week 4 Stage 13/14 Stage 22 Neural Head and Neck Heart Vasculature Gastrointestinal Urogenital Other Embryos Larsen Internet

Other Embryos ----------------- Chicken Fly Frog Mouse Rabbit Rat Worm Zebrafish Guinea Pig

UNSW Embryology ISBN: 978 0 7334 2609 4

UNSW CRICOS Provider Code No. 00098G