Final answer:
During ventricular systole, the aorta and pulmonary artery are the structures that receive blood as the left ventricle pumps blood into the aorta, and the right ventricle pumps blood into the pulmonary artery.
Step-by-step explanation:
During ventricular systole, which is the phase of the cardiac cycle when the ventricles contract, the aorta and the pulmonary artery receive blood. The aorta receives blood from the left ventricle as it is pumped through the aortic valve. The pulmonary artery receives blood from the right ventricle as it is pumped through the pulmonary valve. Therefore, the correct answers are A. Aorta and D. Pulmonary artery. B. Right atrium and C. Left ventricle do not receive blood during ventricular systole; rather, the right atrium receives deoxygenated blood from the body during ventricular diastole, and the left ventricle is the chamber that actually pumps the blood into the aorta during systole.