Cardio System Flashcards
Atrioventricular bundle (His)
Connects atria with ventricles and transmits impulses
Atrioventricular node (AV node)
Tissue in wall behind atria
Atrium
One of upper chambers of heart
Capillary
Smallest blood vessel
Coronary arteries
Blood vessels branching from aorta that carry blood to heart
Electrocardiogram
Record of electricity in heart
Apex of heart
Lower tip of heart
Diastole
Relaxed phase of heart (tricuspid/mitral valves open and pulmonary/aortic valves close
Endocardium
Inner lining of heart
Endothelium
Innermost lining of blood vessel
Mitral valve
Bicuspid valve; between left atrium and left ventricle
Normal sinus rhythm
Heart rhythm in sinoatrial node 60-100 BPM
Pacemaker (sinoatrial)
Nervous tissue in right atrium begins heartbeat
Pericardium
Double-layered membrane surrounding heart
Pulmonary artery
Carries oxygen poor blood from heart to lungs
Pulmonary circulation
Flow of blood. Heart to lungs and back
Pulmonary valve
Between right ventricle and pulmonary artery
Pulmonary vein
1 of 2 pairs of vessels carry oxygenated blood from lungs to left atrium
Septum
Wall dividing a cavity
Sphygmomanometer
Measures blood pressure
Systemic circulation
Blood flow from tissue to heart and back