Labels:text | cartoon | black and white | sketch | white OCR: rt S a The Fœtal Circulation (from Wilson's Anatomist's Vide Mecum) : ", the umbilical cord proceeding from a, the placenta ; c, the umbilical vein ; d, d. its branches going to the liver ; e, the ductus venosus ; f, the inferior vena cava; g, the portal vein; h, the right auricle. The uppermost arrow indicates the course of the blood through the foramen ovale. i, the left auricle ; k, the left ventricle. The arrow commencing in the left ventricle, and with its head on the ascending aorta, indicates the course of the blood to be distributed to the head and extremities; 7, the arch of the aorta. The arrows a and n represent the return of the blood from the head and upper extremities, through the jugular and sub- clavian veins, to the superior vena cava. o, to the right auricle, p, and, as shewn by the arrow, through the right ventricle, k, to the pulmonary artery, q; r, the ductus arteriosus; s, s, the descending aorta ; 7, the hypogastric or umbilical arteries ; «, «, the external iliac arteries.
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