Lesson | Topic | Statement(s) and Objective(s) | Activities |
1 | Structure |
6.2.S2: Recognition of the chambers and valves of the heart and the blood vessels connected to it in dissected hearts or in diagrams of heart structure (Oxford Biology Course Companion page 295).
6.2.U7: There is a separate circulation for the lungs (Oxford Biology Course Companion page 295).
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2 | Cardiac Cycle | 6.2.U6: Valves in veins and the heart ensure circulation of blood by preventing backflow (Oxford Biology Course Companion page 294).
6.2.A3: Pressure changes in the left atrium, left ventricle and aorta during the cardiac cycle (Oxford Biology Course Companion page 300).
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3 | Heart Sounds | D.4.U6: Normal heart sounds are caused by the atrioventricular valves and semilunar valves closing causing changes in blood flow (Oxford Biology Course Companion page 688).
D.4. NOS: Developments in scientific research followed improvements in apparatus or instrumentation—the invention of the stethoscope led to improved knowledge of the workings of the heart (Oxford Biology Course Companion page 687).
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4 | Heart Beat | 6.2.U8: The heartbeat is initiated by a group of specialized muscle cells in the right atrium called the sinoatrial node (Oxford Biology Course Companion page 298).
6.2.U9: The sinoatrial node acts as a pacemaker(Oxford Biology Course Companion page 299).
6.2.U10: The sinoatrial node sends out an electrical signal that stimulates contraction as it is propagated through the walls of the atria and then the walls of the ventricles (Oxford Biology Course Companion page 299).
D.4.U2: Signals from the sinoatrial node that cause contraction cannot pass directly from atria to ventricles (Oxford Biology Course Companion page 685).
D.4.U3: There is a delay between the arrival and passing on of a stimulus at the atrioventricular node (Oxford Biology Course Companion page 686).
D.4.U4: This delay allows time for atrial systole before the atrioventricular valves close (Oxford Biology Course Companion page 687).
D.4.U5: Conducting fibres ensure coordinated contraction of the entire ventricle wall (Oxford Biology Course Companion page 687).
D.4.U1: Structure of cardiac muscle cells allows propagation of stimuli through the heart wall. (Oxford Biology Course Companion page 685).
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5 | Heart Technology | D.4.S3: Mapping of the cardiac cycle to a normal ECG trace (Oxford Biology Course Companion page 689).
D.4.A1: Use of artificial pacemakers to regulate the heart rate (Oxford Biology Course Companion page 689).
D.4.A2: Use of defibrillation to treat life-threatening cardiac conditions (Oxford Biology Course Companion page 690).
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6 | Heart Rate | 6.2.U11: The heart rate can be increased or decreased by impulses brought to the heart through two nerves from the medulla of the brain (Oxford Biology Course Companion page 301).
6.2.U12: Epinephrine increases the heart rate to prepare for vigorous physical activity(Oxford Biology Course Companion page 302).
D.4.S1: Measurement and interpretation of the heart rate under different conditions (Oxford Biology Course Companion page 688).
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7 | Disease | D.1.U6: Malnutrition may be caused by a deficiency, imbalance or excess of nutrients in the diet (Oxford Biology Course Companion page 664).
D.1.U9: Starvation can lead to breakdown of body tissue (Oxford Biology Course Companion page 666).
D.1.A4: Breakdown of heart muscle due to anorexia (Oxford Biology Course Companion page 666).
D.4.S4: Analysis of epidemiological data relating to the incidence of coronary heart disease (Oxford Biology Course Companion page 692).
6.2.A2: Causes and consequences of occlusion of the coronary arteries (Oxford Biology Course Companion page 297).
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A&B: flagging heart (questions) A&B: Chuck Murry: Can we regenerate heart muscle with stem cells? | TED Talk |
8 | Wrap Up and Review | Cardiac cycle puzzle directions Cardiac cycle puzzle key Anyone who had a heart case study |