| A | B |
|---|
| heart beats/minute at rest | 60-80bpm |
| right atrium | receives O2 poor blood from body |
| tricuspid valve | valve between right arium/ventricle |
| right ventricle | lower chamber on right side of heart |
| pulmonary arteries | carry blood from ventricle to lungs |
| pulmonary veins | carry blood to left atrium from lungs |
| lungs | oxygenate blood |
| left atrium | receives oxygen rich blood |
| mitral valve | valve located inbetween left atrium/ventricle |
| left ventricle | thick walled chamber of heart |
| aorta | largest blood vessel in heart |
| arteries | carry blood away from heart |
| veins | carry blood to heart |
| capillaries | exchange 02 for C02 |
| red blood cells | carry oxygen |
| white blood cells | fight disease |
| platelets | cause clots |
| hypertension | high blood pressure |
| systolic | heart contracting |
| diastolic | heart relaxing |
| myocardium | cardiac muscle tissue |
| endocardium | smooth lining of heart chambers |
| pericardium | sac of the heart |
| epicardium | covers surface of heart |
| septum | divides the heart vertically |
| interatrial septum | separates the atria |
| interventricular septum | separates the ventricles |
| lub | sound of the closure of the AV valves |
| dub | sound of the closure of the semilunar valves |
| pulmonary circulation | movement of blood from right ventricle to lungs |
| systemic circulation | movement of blood from left ventricle to the entire body |
| coronary circulation | delivery of oxygen rich blood to cardiac muscle and return of oxygen poor to venous system |
| coronary arteries | supply oxygen and nutrients to myocardium |
| myocardial infarction | heart attack |
| angina pectoris | chest pain due to inadequate oxygen to heart |
| stroke volume | blood ejected from ventricles with each beat |
| cardiac output | amount of blood one ventricle can pump each minute |
| intercalated disks | electrical connectors that join cardiac muscle fibers together |
| SA (sinoatrial node) | pacemaker of the heart, located near superior vena cava in rt. atrium |
| AV (atrioventricular node) | located in rt. atrium along lower interatrial septum |
| AV bundle (bundle of HIS) | located in septum of ventricle |
| purkinje fibers | located in walls of ventricles |
| electrocardiograph | instrument used to record electrical impulses of heart |
| electrocardiogram | record of the hearts electrical activity |
| P wave | depolarization of the atria |
| QRS complex | depolarization of the ventricles |
| T wave | repolarization of the ventricles |
| depolarization | electrical activity that triggers contraction of the heart muscle |
| repolarization | occurs just before the relaxation phase of cardiac muscle activity |
| tunica intima | inner layer of vessel |
| tunica media | smooth muscle within vessel |
| tunica adventitia | layer of connective tissue the reinforces the strength of the vessel |
| pulse | alternate expansion and recoil of the blood vessel wall |
| fetal circulation | circulation before birth |
| placenta | exchange of oxygen and nutrients occurs in fetus |
| umbilical arteries/vein | make up umbilical cord |
| ductus venous | allows blood returning from placenta to bypass immature liver in fetus |
| ductus arteriosus | connects aorta and pulmonary artery in fetus |
| foramen ovale | shunts blood directly from rt. to left atrium in fetus |
