Awidened, stretched-out portion of a blood vessel that forms a bulge is called a(n)

Aneurysm.

Explanation:

Aneurysm may be defined as the medical condition in which there is an abnormal ballooning in the blood vessels wall. This can rupture and might cause the bleeding and death as well.

This aneurysm does have any known symptoms only the blood vessels gets widen and bulge. This is experienced by the pain and aorta section pass through the abdomen or may also pass through the chest.

Thus, the correct answer is aneurysm.

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