Answer: Between the first and second heart sounds of the cardiac cycle, systole is a time of contraction of the heart's ventricles (the sequence of events in a single heart beat).
Explanation:
Answer:
B
BECAUSE I KNOW LOP
false boiiiii
the first thing is I need to stop lying and be a better person
everyone lies but its easier to get into trouble than out of trouble and that needs to change be honest
