What are the string-like structures in the heart that anchor the atrioventricular valves?Multiple Choicecingulated pectoralechordae tendineaecorpus albicanscorpus callosumchoroid plexus

What are the strong fibrous strings called that attach the AV valves to the papillary muscles?Multiple choice question.semilunar chordschordae tendineaeatrioventricular sulcusmyocardium

What are the upper chambers of the heart called?Multiple ChoiceatriaauriclesAV valvesventriclessepta

What prevents the atrioventricular valves from inverting into the atrium against the pressure of blood from the ventricles?Multiple choice question.chordae tendineae and papillary musclesthe shape of the valvesblood pressure in the atria

What are the chordae tendineae?Multiple choice question.bunches of muscles within the myocardiumtough fibrous cords that anchor the AV valves to the papillary musclesthe ear-like external appendages of the atriamodified muscles cells that conduct impulse during contraction

Papillary muscles are attached to the cusps of valves by thin, strong, connective tissue strings calledMultiple Choicethe chordae tendineae.the interventricular septa.the interventricular sulcus.the auricles.the coronary sinus.