The appendicular vein removes oxygen-depleted blood from the appendix, which is located at the bottom of the ascending colon.

As an organ, the appendix may not be as important to our body’s functioning as it once was but it is thought to be home to some bacteria that help with digestion in the large intestine.

Oxygen-depleted blood from the appendix moves through the appendicular vein to the ileocolic vein. This blood continues through the venal system, eventually being reoxygenated in the lungs. The appendicular vein is not to be confused with the appendicular artery, which delivers oxygenated blood to the appendix.

During surgical removal of the appendix (appendectomy), both the appendicular vein and artery are tied off (or ligated).