A & P Lecture-Heart Flashcards
what do you call the pump of the cardiovascular system
what does the heart do
facilitates the bloods transporting of materials through the body
Cardiac muscle tissue is found in which layer of the heart
what valve is found between the right atrium and the right ventricle
which blood vessels leave the heart and transport blood to the lungs
what structures prevent prolapse of the atrioventricular valves?
can pectinate muscles be identified in the ventricles?
NO, you can however identify trabeculae carneae,papillary muscles, and chordae tendineae
what vessels carry blood to the heart
what do arteries do
carry blood away from the heart
blood being pumped out of the left ventricle enters the...
Blood is prevented from flowing back into the left ventricle by?
aortic semilunar valve
Deoxygenated blood from the myocardium enters the right atrium through what?
without SA node input what would the heart rate be?
50 beats per minute
The atrioventricular bundle is located where?
Atrial repolarization occurs during this period of time,seen on an ECG
The entire ventricular myocardium remains depolarized during this time on an ECG
Nerve impulses are directly supplied to the papillary muscles by what?
Subendocardial conducting network
The lub-dup heart sounds heard during auscultation of the heart are associated with
the heart valves closing
when are all four heart valves closed?
During what phase does stroke volume decrease in the ventricles
during which part of the cardiac cycle would pressure in the ventricle be at its lowest
the greatest decrease in ventricular pressure occurs at this time
the amount of blood pumped out of each ventricle in one minute is called
where is the heart enclosed?
which direction does the heart tip slightly?
to the left
How many layers does the pericardium have?
2 layers, a fibrous and a serous layer