A description of the purpose and function of a human heart including an explanation of double circulation and why heart attacks occur. Includes a demonstration of ECGs and their use in measuring heart rate and function. The risk of a heart attack can be lowered by not smoking, reducing the amount of fatty foods eaten and taking regular exercise.
Use this clip to introduce or recap the basic structure of the heart and explain its role in respiration. Students could draw a diagram, or create a 2D model of the blood's circulation through the heart.