File:Human Embryo 17.8mm a CNS GIT.jpg

Human Embryo (17.8mm) Gastrointestinal Tract

Brain and Digestive System

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.

Original file name: Thyng104.jpg

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

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.

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.

UNSW Embryology Link: Development History- 1914 - 17.8mm Human Embryo

Dr Mark Hill 2009, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G