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VT 106 Lab Objectives – Lab Chapter 10 part 1 – heart Examine the diagrams and models of the heart, the heart in situ in the dissected cat, and perform the dissection of the sheep heart. Be able to define and identify (where possible) the following. mediastinum pericardial sac pericardial cavity parietal pericardium visceral pericardium pericardial fluid external heart epicardium (visceral pericardium) base apex coronary sulcus (groove) coronary vessels / coronary sinus interventricular sulci (grooves) right and left ventricle right and left atrium right and left auricle cranial vena cava caudal vena cava pulmonary trunk / pulmonary arteries aorta pulmonary veins internal heart myocardium endocardium right atrium cranial and caudal vena cava coronary sinus interatrial septum fossa ovalis / foramen ovale right atrioventricular (AV) valve / tricuspid valve chordae tendineae right ventricle trabeculae papillary muscles moderator band pulmonary [semilunar] valve pulmonary trunk / pulmonary arteries left atrium pulmonary veins left atrioventricular (AV) valve / bicuspid valve / mitral valve chordae tendineae left ventricle trabeculae papillary muscles aortic [semilunar] valve interventricular septum Know the pattern of blood flow through the heart and how the following terms relate to cardiac function. right heart / pulmonary circuit / pulmonary vessels left heart / systemic circuit / systemic vessels oxygenated blood deoxygenated blood first heart sound second heart sound Study the normal ECG pattern on page 232. Be able to define and identify the following. P wave / atrial depolarization QRS complex / ventricular depolarization T wave / ventricular repolarization P-Q segment / AV node and AV bundle (bundle of His) normal sinus rhythm sinoatrial (SA) node / pacemaker Know how the ECG is related to the cardiac cycle. Be able to define the following and know when each of the following occurs. atrial systole atrial diastole ventricular systole vetricular diastole