Final answer:
Veins that drain the inferior bladder, cervix, and upper and middle vagina, flow into the common iliac vein, which then drains into the inferior vena cava. The ovaries are drained by the ovarian veins, with the right ovary draining directly into the inferior vena cava and the left into the left renal vein.
Step-by-step explanation:
The structures that drain the inferior bladder, cervix, and upper and middle vagina, are part of the intricate venous network within the pelvic region. These pelvic organs and integument are drained by veins that eventually merge and flow into the common iliac vein. Importantly, the inferior vena cava plays a critical role as it receives blood from the veins coming from the lower organs and legs.
The ovary has its own venous drainage system where the right ovarian vein empties directly into the inferior vena cava, and the left ovarian vein drains into the left renal vein. Furthermore, regarding arterial supply, the internal iliac artery branches off from the common iliac arteries, which then supply blood to the urinary bladder, pelvic wall, external genitalia, parts of the femoral region, and in females, the uterus and vagina.
The common iliac vein itself drains into the inferior vena cava at the level of L5. These aspects of the venous and arterial systems ensure the proper circulation and removal of blood from the pelvic organs.