Where do aneurysms primarily take place?

Aneurysms primarily occur in arteries because they are balloon-like dilations that form in the walls of blood vessels due to weaknesses or damage. The arterial pressure is significantly higher compared to veins and capillaries, making arteries more susceptible to the stress that can lead to an aneurysm.

Arteries have thicker muscle and elastic layers to withstand this pressure, but if these layers become weakened or compromised—often due to factors like atherosclerosis, hypertension, or genetic conditions—an aneurysm can develop. These weak points can expand considerably, posing serious health risks if they rupture. While aneurysms can cause issues impacting the heart and circulation more broadly, the specific anatomical location of an aneurysm is predominantly within an artery.