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Heart
Recognize the structures of the mammalian heart in diagrams and images, including the muscular wall, septum, left and right ventricles, left and right atria, one-way valves, and coronary arteries.
11
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110
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77
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90 min
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CambridgeIGCSEBiologyTransport in animals
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Heart outcomes11 objectives
- Recognize the structures of the mammalian heart in diagrams and images, including the muscular wall, septum, left and right ventricles, left and right atria, one-way valves, and coronary arteries.
- Indicate that blood is transported away from the heart through arteries and returns via veins.
- Indicate that heart activity can be monitored using ECG, pulse rate, and by listening to the sounds of closing valves.
- Examine and explain how physical activity influences heart rate.
- Explain coronary heart disease as a blockage of coronary arteries and identify potential risk factors such as diet, lack of exercise, stress, smoking, genetic factors, age, and sex.
- Discuss how diet and exercise contribute to lowering the risk of coronary heart disease.
- Recognize the atrioventricular and semilunar valves in diagrams and images of the mammalian heart.
- Clarify the differences in thickness between the muscle walls of the left and right ventricles, and between the atria and ventricles.
- Clarify the significance of the septum in keeping oxygenated and deoxygenated blood separate.
- Describe how the heart functions through the contraction of the atrial and ventricular muscles and the operation of the valves.
- Clarify how physical activity affects heart rate.
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