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Internal Iliac Artery
Cardiovascular System

Internal Iliac Artery

Arteria iliaca interna

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Quick Facts

Origin: Common iliac artery.

Course: Travels inferiorly within pelvic cavity.

Branches: Anterior and posterior division of the internal iliac artery.

Supplied Structures: Pelvic cavity, perineum, and gluteal region.

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The internal iliac artery arises at the level of the sacroiliac joint as a consequence of the bifurcation of the common iliac artery.


It crosses the pelvic brim and travels in a posteroinferior direction towards the superior margin of the greater sciatic foramen.


The internal iliac artery divides into an anterior and posterior division. However, there is huge variation in the branching pattern of the internal iliac arteries and these divisions may not always be present (Tubbs et al., 2016).

Supplied Structures

The anterior division supplies the pelvic viscera, perineum, and a portion of the gluteal region, as well as the medial and adductor compartment of the thigh.

The posterior division contributes to the supply of the walls of the pelvic cavity and the lumbar and gluteal regions.


Tubbs, R. S., Shoja, M. M. and Loukas, M. (2016) Bergman's Comprehensive Encyclopedia of Human Anatomic Variation. Wiley.

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Internal Iliac Artery

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The internal iliac artery (IIA) is a branch of common iliac artery, and it divides into the anterior and posterior divisions.

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