Posterior division of internal iliac artery
Blood vessels · Latin: Divisio posterior arteriae iliacae internaecus
The arrangement of branches of the internal iliac artery is variable.
Typically, the artery divides into an anterior division and a posterior division, with the posterior division giving rise to the superior gluteal, iliolumbar, and lateral sacral arteries.
Definition from Wikipedia, CC BY-SA 4.0.