lecture 1.2 Flashcards
the ___ ___ attach papillary muscles to “AV” valves
chordae tendineae
the ___ cells produce electrochemical impulses to stimulate cardiac muscle contraction
autoregulatory
the ___ node initiates heartbeats
sinoatrial
the SA node stimulates ___ contraction
atrial
the SA node is also known as the ____ of the heart
pacemaker
the ___ node stimulates ventricular contraction
atrioventricular
the perkinje fibers carry AV node impulse through ___ and ____
septum/ apex
the protection for the cardio system includes ribs, sternum, ___ sac and ___
pericardial/ pericardium
the percardium consists of ___ and __ layer
fibrous/ serous
the epicardium consists of __ and __ layer
parietal/ visceral
the pericardial cavity is between ___ layers
serous
the pericardial fluid provides
lubrication
___ node initiates heartbeat with impulse
SA
after the SA node sends an impulse, the __ contracts simultaneously
atria
After the atria contracts, the impulse stimulates the ___ node
AV
After the AV node is stimulates, it sends an impulse through ___ ___
perkinje fibers
After the perkinje fibers are stimulated, both ventricles contract simultaneously from ___
apex
when the heart muscle contracts it is called ___
systole
when the heart muscle relaxes it is called ___
diastole
during atrial systole, the ___ __ & ___ ___ close
vena cava/ pulmonary veins
during atrial systole the ___ valves open
atrioventricular
during ventricular systole the ___ valves close
AV
during ventricular systole the ____ valves open
semilunar
