External iliac vein
The vein enters the pelvis via the vascular lacuna and then ascends medially along the medial side of the psoas major muscle. As the external iliac vein reaches the sacroiliac joint, it unites with the internal iliac vein to form the common iliac vein.
Along their course, the external iliac veins are accompanied by the external iliac arteries. The external iliac vein receives the following veins:
- Inferior epigastric vein
- Deep circumflex iliac vein
- Pubic vein
In general, the external iliac vein is responsible for collecting venous blood from the muscles and skin in the lower anterior abdominal wall, pelvis, and lower extremity.