(anatomically known in Latin as the arteria appendicularis and sometimes misspelled as appendicelaris ) is the terminal blood vessel supplying the vermiform appendix.
This 2022 research paper provides a statistical breakdown of where the artery originates in human patients, showing that it arises from the inferior division of the superior mesenteric artery in 46.88% of cases, the ileal branch in 28.13%, and the ileocolic artery in 18.75%. You can read the full text on NCBI PMC . arteria appendicelaris
Because it is an (meaning it lacks significant collateral circulation), any blockage or thrombosis caused by inflammation (appendicitis) can rapidly cause gangrene, necrosis, or perforation of the appendix. (anatomically known in Latin as the arteria appendicularis