File:McMurrich1930 fig86.jpg

Fig. 86. Diagram of the Umbilical and Hypogastric Vessels

(AnB, 29v.)

Leonardo’s adherence to the traditional ideas as to the movements of the blood and the significance of the arteries and veins made an understanding of the relation of the maternal and fetal blood-vessels impossible for him, even though he had gained a knowledge of the vessels concerned in the fetal circulation. On AnB, 29v there is a figure representing these vessels as he observed them in the fetal calf (fig. 86). A number of branches are shown passing from the fetal membranes, some represented as almost vertical and others as almost horizontal, the accompanying text stating that the former come from the chorion and the latter from the amnion, though it is more probable that the allantois was meant. These branches open into four main stems that pass to the umbilicus, where they converge to a single umbilical vein that passes up the inner surface of the anterior abdominal wall to the under surface of the liver. In the substance of that organ, it breaks up into numerous branches and is not continued further. From the umbilicus four other vessels pass downward to open into the right and left iliac arteries and veins; the arteries are evidently the hypogastrics, the veins are imaginary.

• hypogastric artery - (internal iliac artery) the main artery in the pelvic region, hips, thighs, and the reproductive organs.
• hypogastric vein - (internal iliac vein) begins near the upper part of the greater sciatic foramen, passes upward behind and slightly medial to the internal iliac artery and, at the brim of the pelvis.

Reference

McMurrich JP. Leonardo da Vinci - the anatomist. (1930) Carnegie institution of Washington, Williams & Wilkins Company, Baltimore.

Cite this page: Hill, M.A. (2024, April 25) Embryology McMurrich1930 fig86.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:McMurrich1930_fig86.jpg

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