Examlex
Why are phylogenetic data in the domain Eukarya overall harder to obtain than phylogenetic evidence in either the Bacteria or Archaea domains? How has this affected the systematics of Eukarya?
Second Heart Sound
The second heart sound is produced by the closing of the aortic and pulmonary valves at the beginning of ventricular diastole.
Ventricular Systole
The phase of the cardiac cycle in which the ventricles contract, pumping blood out of the heart into the arterial system.
Ventricular Diastole
Dilation of the heart ventricles.
ECG
Electrocardiogram, a test that measures the electrical activity of the heart over a period of time.
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