I-artery communicating, eyaziwa nangokuthi i-arterial anastomosis, imithambo yegazi encane ehlanganisa imithambo emibili emikhulu emzimbeni. Ngokuqondile, kubhekiselwa emithanjeni emibili ebalulekile ebuchosheni: umthambo ongaphambili wokuxhumana nomthambo ongemuva. Le mithambo isiza ukugcina ukugeleza kwegazi njalo ukuya ebuchosheni, ngisho noma omunye wemithambo emikhulu uvaleka noma ulimele. Imithambo exhumanayo idlala indima ebalulekile ekulawuleni umfutho wegazi nokunikezwa komoyampilo ebuchosheni, futhi ibalulekile ekuxilongeni nasekwelapheni izimo ezithile zemizwa, njengokushaywa unhlangothi kanye ne-aneurysm.