The common iliac artery supplies blood to which part of the body?

The common iliac artery plays a crucial role in supplying blood to various regions of the body, primarily focusing on the lower abdomen and pelvic areas. When the common iliac artery branches from the abdominal aorta, it divides into the internal and external iliac arteries.

The internal iliac artery is primarily responsible for supplying blood to the pelvic organs, such as the bladder, rectum, and reproductive organs, while the external iliac artery continues down to supply blood to the legs.

The abdominal walls receive blood through various branches from both the internal and external iliac arteries, especially through the branches of the internal iliac artery. This blood supply is essential for maintaining the health and function of the abdominal walls. The other options—legs, chest, and brain—are supplied by different arteries, making the abdominal walls the correct focus for the common iliac artery's contributions.