develops from lymphatic vessel thoracic duct trunk of thoracic duct tree UBERON:0001631 EMAPA:19310 SCTID:362600004 MESH:D013897 NCIT:C33768 GAID:1290 TAO:0005110 MA:0002801 ZFA:0005110 FMA:5031 A major lymphatic vessel that drains lymph from the lower body, left appendage, and left thorax into the junction of the left jugular and subclavian veins. EHDAA2:0004501 Wikipedia:Thoracic_duct ductus thoracicus posterior cardinal vein body-wall mesenchyme