A) discharging chambers
B) called ventricles
C) receiving chambers
D) both a and b above

A) deals with oxygen-poor blood
B) deals with oxygen-rich blood
C) is the pump for systemic circulation
D) both b and c above

A) atrial systole follows ventricular systole
B) atrial systole precedes ventricular systole
C) atrial and ventricular systole occur at the same time
D) none of the above