File:West08.jpg

Fig. 8 Embryo at anterior neural pore closure

This is a globular mass which overhangs the pharynx and mouth region; at the point indicated in Text- fig. 8 there can be seen the remains of the anterior neuropore, the closure of which has been just completed, and the rolled-in edges of the brain wall show very well in the sections and it can be seen that the head ectoderm also istucked a litleinto the groove at the point of closure; the condition is very like that figured and described by Sternberg (1927) in an embryo of 25 somites, and 2-7mm. inlength. Just to the cranial side of the pharyngeal membrane there is a slight downgrowth of the floor of the brain which marks the infundibular region (Text-figs. 1 and 8), and at this point the brain wall and mouth cavity are in contact and it is here that the notochord comes to an end.

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Reference

West CM. A human embryo of twenty-five somites. (1937) J. Anat., 71(2): 169-200.1. PMID 17104635

Cite this page: Hill, M.A. (2024, April 19) Embryology West08.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:West08.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

Reference

West CM. A human embryo of twenty-five somites. (1937) J. Anat., 71(2): 169-200.1. PMID 17104635

Cite this page: Hill, M.A. (2024, April 19) Embryology West08.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:West08.jpg

What Links Here?

© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G