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Describe the functioning of the heart in terms of the contraction of muscles of the atria and ventricles and the action of the valves
1 Answer Explain the importance of the septum in separating oxygenated and deoxygenated blood
1 Answer 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
1 Answer Identify in diagrams and images the atrioventricular and semilunar valves in the mammalian heart
1 Answer Discuss the roles of diet and exercise in reducing the risk of coronary heart disease
1 Answer 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
1 Answer Investigate and describe the effect of physical activity on the heart rate
1 Answer State that the activity of the heart may be monitored by: ECG, pulse rate and listening to sounds of valves closing
1 Answer Describe the single circulation of a fish
1 Answer Describe the circulatory system as a system of blood vessels with a pump and valves to ensure one-way flow of blood
1 Answer
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