part of part of vessel supplies blood to system endometrium artery uterine spiral artery UMLS:C1519470 spiral artery UBERON:0015171 SCTID:24628006 EMAPA:36612 NCIT:C33592 spiral artery endometrial spiral artery endometrial spiral arteriole Wikipedia:Spiral_artery A corkscrew-like artery in premenstrual or progestational endometrium; uterine spiral arteries play a vital role in supplying nutrients to the placenta and fetus, and are thus remodeled into highly dilated inelastic vessels by the action of invading trophoblast (physiological change). BTO:0003371 endometrial blood vessel