File:Hertwig1892 fig320.jpg

Fig. 320. Sagittal reconstruction of a human embryo 5 mm long

neck measurement (embryo R, His), to illustrate the development of the pericardio-thoracic cavity and the diaphragm, after Wilhelm His (1831-1904).

ab, Aortic bulb ; brh, thoracic cavity (recessus parietalis, His) ; kh, pericardial cavity ; tie, ductus Cuvieri ; dc, vitelline vein (v. omphalomesenterica) ; nv, umbilical vein ; vca, cardinal vein ; vj, jugular vein ; Ig, lung ; z + I, fundament of the diaphragm and the liver ; uk, lower jaw.

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The Development of the Blood-vessel System

Reference

Historic Textbook Text-Book of the Embryology of Man and Mammals by Dr Oscar Hertwig (1892)