part of ends during starts during vein death tail vasculature subintestinal vein lab UBERON:0011944 Vein that is formed from and drains into the left omphalomesentric vein, and by NF stage 40, it is on the left side of the gut. It moves to the most ventral aspect of the gut during stage 41, and is on the right side of the gut by stage 43. XAO:0004172 xenopus_anatomy 2011-08-31T11:24:56Z trunk vasculature NF stage 40