Fig. 3. VV remnant and umbilical branch of the inferior epigastric artery in sagittal sections of a fetus with a crown-rump length of 46 mm. H&E staining. (A) Shows a plane in the right-lateral side of (F). Panels (E) and (G, H) are higher magnification views of the rectangles in (D) and (F), respectively. The insert in the left-bottom of (C) shows the umbilical branch (artery) of the inferior epigastric artery (square in C). The remnant of the VV originates from the anterior surface of the PA (D), runs between the liver and transverse colon (TC in D) or between the liver and JE (D, F), and reaches the superior side of the umbilical artery (A–D). (E) Shows a candidate lymphatic vessel (lymph) along the umbilical artery at the umbilicus. Scale bars in A to D, F=1 mm; in C-insert, E, G, and H=0.1 mm. VV, vitelline vein; AL, allantois; RA, rectus abdominis; UA, umbilical artery; UV, umbilical vein; PA, pancreas; JE, jejunum.
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