The cardiovascular system is composed of two circulatory paths: pulmonary circulation and systemic circulation. Systemic circula
tion is the movement of blood from the heart through the body to provide oxygen and nutrients to the tissues of the body while bringing deoxygenated blood back to the heart. Where does oxygenated blood enter the heart? A) Oxygenated blood enters the left atrium from the pulmonary veins.
B) Oxygenated blood is pumped through the aortic valve and into the aorta.
C) Oxygenated blood enters through the mitral valve into the left ventricle.
D) Oxygenated blood enters the right atrium through the superior and inferior venae cavae.
