What is "internal iliac vein"?

The internal iliac vein is part of the venous system in the human body and serves as a major pathway for returning deoxygenated blood from the pelvis and its surrounding structures back to the heart. It receives blood from various veins within the pelvis, including the pelvic organs, muscles, and bones. The internal iliac vein plays a vital role in maintaining proper blood circulation and drainage in the lower abdominal and pelvic regions.