THE HEART Flashcards
The heart is considered a double pump because simultaneously it supplies both the ________ and _______ circuits
pulmonary and systemic
what is the main purpose of the CV system
provides blood flow to all tissues and organs according to their immediate needs
how long is the hear
12-14 cm
how wide is the heart
9cm
weights of the heart
250-350g
what is the mediastinum
cavity between the 2 pleural cavities
where is the pericardial fluid produced
parietal pericardium
list the components of the heart wall from innermost to outermost
endocardium
myocardium
epicardium
the difference in thickness of the walls reflects what
the workload of the chamber
what causes an AV valve to open
atrial pressure > ventricular pressure
what causes an AV to close
atrial pressure < ventricular pressure
what causes SLV to open
ventricular pressure > arterial pressure
what causes SL valves to close
arterial pressure > ventricular pressure
