Lecture 16 organization of the cardiovascular system pages 186-189. Objective 2: describe the direction that blood circulates through the cardiovascular system and the type of blood vessels found. Objective 3: illustrate the waves of the electrocardiogram: p wave: corresponds to atrial contraction, qrs complex: corresponds to ventricular depolarization, t wave: corresponds to ventricular repolarization. Key words: atrium, ventricle, mitral, tricuspid, bicuspid, semilunar, intercalated disc, desmosome, gap junction, bradycardia, tachycardia, sinus rhythm. Lecture 17 the cardiac cycle pages 189-191. Objective 1: illustrate and understand the key mechanical and electrical events and timing of the cardiac cycle: timing of the cardiac cycle, 30% systole 70% diastole, phases of the cardiac cycle. Isovolumic contraction a: ejection c, early ventricular filling, late ventricular filling (diastasis, atrial contraction. Key words: cardiac cycle, stroke volume, ejection fraction, cardiac output, end-diastolic volume, end-systolic volume, systolic blood pressure, diastolic blood pressure. Lecture 18 control of cardiovascular function pages 192-201; 295-298.