what do you call the pump of the cardiovascular system
the heart
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
myocardium
what valve is found between the right atrium and the right ventricle
tricuspid
which blood vessels leave the heart and transport blood to the lungs
pulmonary arteries
what structures prevent prolapse of the atrioventricular valves?
chordae tendineae
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
Veins
what do arteries do
carry blood away from the heart
blood being pumped out of the left ventricle enters the...
aorta
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?
coronary sinus
without SA node input what would the heart rate be?
50 beats per minute
The atrioventricular bundle is located where?
Interventricular septum
Atrial repolarization occurs during this period of time,seen on an ECG
QRS complex
The entire ventricular myocardium remains depolarized during this time on an ECG
S-T segment
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?
isovolumetric contraction
During what phase does stroke volume decrease in the ventricles
ventricular ejection
during which part of the cardiac cycle would pressure in the ventricle be at its lowest
mid-diastole
the greatest decrease in ventricular pressure occurs at this time
isovolumetric relaxation
the amount of blood pumped out of each ventricle in one minute is called
cardiac output
where is the heart enclosed?
mediastinum
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