The veins of the heart muscle merge to form the_____________________ which empties into the __________________.
The fetal lung bypass from the pulmonary trunk to the aortacloses at birth and becomes ______________________________.
The stabilizing “strings†of the tricuspid and bicuspid valvesare called ___________________________.
The muscular ridges inside the ventricles are called________________________________________.
During ventricular systole, the AV valves are: open orclosed
During ventricular systole (the ventricular ejection phase), thesemilunar valves are: open or closed
During isovolumetric relaxation, the semilunar valves and AVvalves are: open or closed
