What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.8.3.1Mammalian heart structure• External and internal structure of mammalian heartSyllabus objective8.3.2Wall thickness differences• Wall thickness differences: atria vs ventricles, left vs right ventricleSyllabus objective8.3.3Cardiac cycle and valves• Cardiac cycle: blood pressure changes during systole/diastole, valve opening/closingSyllabus objective8.3.4Cardiac conduction system• Roles of sinoatrial node, atrioventricular node, Purkyne tissueSyllabus objective