human_reference_atlas part of has part blood vessel endothelial cell Homo sapiens inferior mesenteric artery artery sigmoid artery https://ccf-ontology.hubmapconsortium.org/objects/v1.2/VH_F_Blood_Vasculature.glb https://ccf-ontology.hubmapconsortium.org/objects/v1.2/VH_M_Blood_Vasculature.glb inferior left colic artery UBERON:0035180 UMLS:C0226330 Wikipedia:Sigmoid_arteries SCTID:265956005 sigmoid artery FMA:14830 sigmoid artery NCIT:C33549 The sigmoid arteries, two or three in number, run obliquely downward and to the left behind the peritoneum and in front of the Psoas major, ureter, and internal spermatic vessels. Their branches supply the lower part of the descending colon, the iliac colon, and the sigmoid or pelvic colon; anastomosing above with the left colic, and below with the superior hemorrhoidal artery. uberon AS