part of develops from ends during starts during vein alimentary system venous endothelium gastric vein xenopus_anatomy XAO:0000389 UBERON:0004450 One of the veins of the alimentary system. The subintestinal vein is on the right side of the gut and drains the gastric vein on its right side by NF stage 43. The gastric veins carry blood low in oxygen from the surface of the stomach, draining into the left omphalomesenteric vein. death trunk vasculature NF stage 43