Lifestyle and the Circulatory System Simplified Revision Notes for Leaving Cert Biology

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Learn about The Circulatory System for your Leaving Cert Biology Exam. This Revision Note includes a summary of The Circulatory System for easy recall in your Biology exam

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Lifestyle and the Circulatory System

Effect of Diet on the Circulatory System

A high-fat diet causes a build-up of cholesterol. Cholesterol can block arterioles and increase the risk of stroke or heart attack.
High salt intake raises blood pressure, increasing the risk of a heart attack.

Effect of Smoking on the Circulatory System

Carbon monoxide (CO) reduces the amount of oxygen (O₂) carried by the blood, lowering energy levels.
Nicotine raises the heart rate and blood pressure, increasing the heart's workload.
Chemicals in tobacco increase the risk of blood clots.

Effect of Exercise on the Circulatory System

Regular exercise strengthens the heart, leading to improved circulation.
Exercise enhances the body's ability to transport oxygen, increasing energy levels.

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