tricuspid, pulmonary semilunar, bicuspid, aortic semilunar
the four vales of the heart are (?), (?), (?), and (?)
this valve prevents backflow from right ventricle and right atria during ventricular contraction - located in right atroventricular orifice
this valve prevents backflow from the pulmonary trunk to right ventricle - located in entrance to pulmonary trunk
this valve prevents backflow from left ventricle to left atria - located in left atrioventricular orifice
this valve prevents backflow from aorta to left ventricle - located in entrance to aorta
these are fibrous tendons attached to cusps of bicuspid and tricuspid valves on ventricular side
blah blah blah.see video
Explain the path of blood flow in the heart. Remember, oxygenated vs unoxygenated
heart, cardiac muscle
our heartbeat is myogenic, meaning that the signal originates inside the (?) in pacemaker cells derived from the (?)
sinoatrial (sa), right, epicardium, superior
the (?) node is a patch of modified myocytes in the (?) atrium, just under the (?) near the (?) vena cava. this is the pacemaker that stimulates contraction in atrial muscles.
atrioventricular, conduction, walls or syncytia
the (?) node is located in the floor of the right atrium near the interatrial septum. It is the (?) pathway between atrial and ventricular (?)
the impulse from the SA does not quite (?) the AV node. the impulse must (?) through tissue from end of SA fiber to AV node.
atrioventricular bundle (His), interventricular, left,right, purkinje
the impulses leave the AV node and travel along the (?). this bundle enters the (?) septum, divides into (?) and (?) branches before finally giving rise to (?) fibers.
papillary, apex, myocardium, impulse, contraction
the purkinje fibers spread into (?) muscles and into (?) of heart. then, they branch throughout ventricular (?). the (?) from the purkinje fibers cause the (?)