In human anatomy, the common iliac veins are formed by the external iliac veins and internal iliac veins and together, in the abdomen at about the level of the umbilicus, form the inferior vena cava. They drain blood from the pelvis and lower limbs.

Both common iliac veins are accompanied along their course by common iliac arteries.

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  Diagram showing completion of development of the parietal veins.
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  The venæ cavæ and azygos veins, with their tributaries.
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  The veins of the right half of the male pelvis.
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  Scheme showing relative positions of primary lymph sacs.

• Template:GraySubject – “The common iliac arteries”

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