Quiz 2 Flashcards
Receives blood returning from the heart
Atrium
Prevents back flow of blood
Valves
Pumps blood throughout the body
Ventricles
to prevent inversion or prolapse of valves
Papillary muscle
supply blood to the heart muscle
Coronary artery
return deoxygenated blood to the right atrium of the heart
Coronary vein
transporting de-oxygenated blood from the right ventricle to the lungs
Pulmonary artery
carrying oxygenated blood from the lungs back to the left atrium of the heart
Pulmonary vein
carries blood away from the left ventricle and circulates it into the systemic circuit
Aorta
Brings blood to right atrium
Vena Cava
Attached to papillary muscle and atrioventricular valves to prevent back flow of blood
Chordae Tendinea
Separates ventricles of heart
Posterior interventricular sulcus
Lines the heart to prevent over inflation of the heart
Pericardial membrane
Valves attached to major arteries/veins
Semilunar valves
Keeps the heart beating
Sinoatrial node
Backup pacemaker
Atrioventricular node
Signals muscle cells to contract
Purkinje fibers
What is the conduction pathway through the heart?
SA node, AV node, AV bundle, Purkinje fibers
Composite recording of all action potentials produced by nodal and myocardial cells
ECG
Atrium contract/polarizes
P wave
Atria relaxes/repolarizes while ventricles contract/depolarize
QRS complex
Ventricle repolarizes/relaxes
T wave
What is the healthy heart rate?
60-100 bpm
How do you calculate heart rate?
number of beats/sec x 60 sec/1 min
