Final answer:
A stroke occurs when a blood vessel to the brain is blocked or bursts, leading to cell death. Aneurysms can weaken vessel walls and lead to internal bleeding. Hemorrhagic strokes result from blood leaks or ruptures, causing damage to brain cells.
Explanation:
Stroke: A stroke occurs when a blood vessel leading to the brain is blocked or bursts, preventing that part of the brain from receiving blood and oxygen, leading to cell death.
Aneurysm: Weakening of the wall of a blood vessel, causing it to thin and balloon out, and possibly eventually burst, resulting in internal bleeding.
Hemorrhagic stroke: A hemorrhagic stroke happens when an artery in the brain leaks blood or ruptures (breaks open), damaging brain cells due to increased pressure.
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