Final answer:
Ventricular contraction is the forceful squeezing of blood out of the ventricles and into the arteries.
Step-by-step explanation:
Ventricular contraction is the subject of this question. Ventricular contraction refers to the forceful squeezing of blood out of the ventricles and into the arteries.
During ventricular contraction, the QRS complex in an ECG represents the depolarization of the ventricles, which is the electrical signal that triggers the contraction.
Ventricular contraction is an essential part of the cardiac cycle, ensuring that oxygenated blood is efficiently pumped to the body's organs and tissues.