. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. Fig. 3. Early stage of the fusion of the ultimo- branchial body with the thyroid. Section No. 323, Embryo No. 816, 12 mm. Harvard collection. Photograph, X 150. L. Lumen of the body; R. re- ticulation ; Th. .••^V>K.'...l«V?*?'<.' Fig. 4. Section showing a later stage of trans- formation of the ulti mobranchial body. , Embryo No. 819,19 mm., Harvard collection. Photo- grapli, X 150. L lumen ; ; Th. thyroid. of the latter, following the bifurcation of the truncus aorticus, brings the
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. Fig. 3. Early stage of the fusion of the ultimo- branchial body with the thyroid. Section No. 323, Embryo No. 816, 12 mm. Harvard collection. Photograph, X 150. L. Lumen of the body; R. re- ticulation ; Th. .••^V>K.'...l«V?*?'<.' Fig. 4. Section showing a later stage of trans- formation of the ulti mobranchial body. , Embryo No. 819,19 mm., Harvard collection. Photo- grapli, X 150. L lumen ; ; Th. thyroid. of the latter, following the bifurcation of the truncus aorticus, brings the tAvo structures closer together. At the time that the con- nection of the caudal pharyngeal complex with the pharynx is broken, the ultimobranchial body is well within the lateral ex- tensions of the thyroid, the more medial portion of the gland, descending more ra- pidly, having ^jassed its level. Further descent of the lateral lobes of the thyroid, extension of their dorsal edges and the growth of the mesoderm within. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Anatomische Gesellschaft. Jena : G. Fischer
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