iGCSE Biology - 9.2 Heart

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This powerpoint is purposefully made for iGCSE Biology students using the most recent Cambridge syllabus.

It covers the following criteria - 9.2 Heart

Core

1. Identify in diagrams and images the structures of the mammalian heart, limited to: muscular wall, septum, left and right ventricles, left and right atria, one-way valves and coronary arteries

2. State that blood is pumped away from the heart in arteries and returns to the heart in veins

3. State that the activity of the heart may be monitored by: ECG, pulse rate and listening to sounds of valves closing

4. Investigate and describe the effect of physical activity on the heart rate

5. Describe coronary heart disease in terms of the blockage of coronary arteries and state the possible risk factors including: diet, lack of exercise, stress, smoking, genetic predisposition, age and sex

6. Discuss the roles of diet and exercise in reducing the risk of coronary heart disease

Supplement

1. Identify in diagrams and images the atrioventricular and semilunar valves in the mammalian heart

2. Explain the relative thickness of:
   (a) the muscle walls of the left and right ventricles
   (b) the muscle walls of the atria compared to those of the ventricles

3. Explain the importance of the septum in separating oxygenated and deoxygenated blood

4. Describe the functioning of the heart in terms of the contraction of muscles of the atria and ventricles and the action of the valves

5. Explain the effect of physical activity on the heart rate