cardiovascular system Flashcards
what is the definition of heart rate
number of times the heart beats per minute
what is the definition of stroke volume
volume of blood ejected out by the heart ventricles per minute
what is the definition of cardiac output
volume of blood ejected out by the ventricles per minute
what is the definition of cardiac hypertrophy
thickening of the muscular wall of the heart so it becomes bigger
what is the definition of bradycardia
a decrease in resting heart rate to below 60bpm
name the 4 chambers of the heart
right atrium, right ventricles, left atrium, left ventricles
what chambers are larger and why
ventricles
they send blood further
what are the main arteries that enter and leave the heart
vena cava, aorta, pulmonary artery, pulmonary vein
name the valves in the heart and where they are located
bicuspid - left atrium
tricuspid - right atrium
semi lunar - aorta, pulmonary artery
what is the main function of the valves
to stop back flow of blood
what happens to resting heart rate following a period of prolonged exercise
decreases
what happens to resting stroke volume following a period of prolonged exercise
increases
what happens to maximal cardiac output following a period of prolonged exercise
increases
what are the stages of the cardiac conduction system
SA node AV node bundle of HIS purkinje fibres ventricular systole
what is meant by the heart is myogenic
it has the ability to create its own impulses
