The aorta is the largest blood vessel in the body, so a ruptured abdominal aortic aneurysm can cause life-threatening bleeding. Depending on the size of the aneurysm and how fast it's growing, treatment varies from watchful waiting to emergency surgery.

Venous bleeding occurs when a vein is torn or cut. The blood will look dark red and ooze out of the body, moving steadily and slowly. It won't shoot out like arterial blood. Although venous bleeding looks different, it can be just as serious as arterial bleeding.

Bleeding from capillaries occurs in all wounds. Although the flow may appear fast at first, blood loss is usually slight and is easily controlled. Bleeding from a capillary could be described as a ‘trickle’ of blood.

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