do cigarettes constrict blood vessels Cardiologists establish how e-cigarettes damage the brain, and lungs Biology Notes for A level:

Biology Notes for A level: #52 Cigarette smoking and health World No Tobacco Day We are all aware that smoking is bad for our health, but do you know how it can impact the brain? Today, on world no tobacco day I've had patients tell me: Doctor, I smoke but I take really good care of my skin. Unfortunately, your skin knows. It knows when blood flow drops. It knows when collagen breaks Smoking affects the heart long before symptoms appear. Each cigarette delivers chemicals that enter the bloodstream within seconds, reaching the heart and blood vessels almost immediately. These substances damage the inner lining

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