From Embryology

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Fig. 596. View of the Foetal Heart and Great Vessels

From the left side to show the vestige of the Left Superior Cava Vein in situ. (This figure is planned after one of Marshall's, and slightly altered according to an original dissection.)

a, right auricle ; b, left auricle and pulmonary veins ; c, the conns arteriosus of the right ventricle ; d, the left ventricle ; c, descending aorta ; + , vestigial fold of the pericardium ; /, arch of the aorta, with a part of the pericardium remaining superiorly ; r/, main pulmonary artery and ductus arteriosus ; [/', left pulmonary artery ; 1,1', right and left internal jugular veins ; 2, 2', subclavian veins ; 3, 3', right innominate and superior vena cava ; 4, left innominate or communicating vein ; 5, 5', remains of the left superior cava and duct of Cuvier, passing at + in the vestigial fold of the pericardium, joining the coronary sinus, 6, below, and receiving above the superior intercostal vein, 7 ; 7', 7', the upper and lower intercostal vein, joining into one.

Heart and Blood-Vessels Figures: 594. Development of Great Veins | 595. A and B. Vestige of Left Superior Cava and a Case of its Persistence | 596. Foetal Heart and Great Vessels | 597. Foetus Organs of Circulation

Reference: Quain's Elements of Anatomy. William Sharpey, Allen Thomson and Edward Albert Schafer (1878) William Wood And Co., New York.

1878 Elements of Anatomy: The Ovum | The Blastoderm | Fetal Membranes | Placenta | Musculoskeletal | Neural | Gastrointesinal | Respiratory | Cardiovascular | Urogenital
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