Fill in the blanks During the two cardiac cycle phases calle

Fill in the blanks

During the two cardiac cycle phases called ____ ____ followed by the ____ ____, ventricular depolarization, causing the QRS wave of the ECG, has triggered systole of the ventricles and the blood moves into the arteries that are named the aorta and pulmonary trunk.

Solution

Answer: During the two cardiac cycle phases called atrial depolarization followed by the isovolumetric contraction, vetricular depolarization, causing QRS wave of the ECG, has triggeres systole of the ventricles and the blood moves into the arteries that are named aorta and pulmonary trunk.

Explanation: Blood in the heart moves from arterioles to ventricles. Atrial depolarization (characterized by P-wave) results in its contraction (systole) and preceeds vetricular depolarization. After atrial systole, AV valves closes. Ventricles begin contraction by shrotening muscles initially thereby raising ntraventricular. This is known as isovolumetric contraction. This is followed by ventricular depolarization (vetricular systole) and repolarization which is represented by QRS complex and the T wave. Contraction of vetricles then pushes the blood into aorta and pulmonary trunk.