Pelvic veins are blood vessels located in the pelvic region that carry deoxygenated blood away from the pelvic organs and lower limbs back to the heart. They include the internal iliac veins, which drain blood from the pelvic organs, and the external iliac veins, which collect blood from the lower limbs. These veins play a crucial role in the circulatory system by ensuring proper blood flow and pressure. They connect to larger veins, such as the inferior vena cava, which transports blood to the heart. Proper functioning of pelvic veins is essential for overall vascular health.