"a condition in the brain, heart or other body arteries in which there is a bulge on the wall of the artery that can cause dangerous bleeding if it bursts is known as"

Aneurysm. An aneurysm occurs when part of an artery wall weakens, allowing it to widen abnormally or bulge out. The causes of aneurysms are sometimes unknown. Some may be congenital, meaning a person is born with them. An aneurysm may also occur as the result of aortic disease or an injury.

Nucleus is the organelle that contains chromosomes