Question

Starting in the right atrium, deoxygenated blood passes through the ___31___ into the ___32___. During ventricular contraction the blood is expelled through the___33___ into the pulmonary trunk and___34___. The blood is carried to the lungs where it is oxygenated through a capillary network and returns to the___35___ via the pulmonary veins. The blood passes through the ___36__ into the___37___. Contraction forces the blood through the___38___ and into the aorta. The aorta has several branches to deliver oxygenated blood throughout the body. The blood passes through capillaries in body tissues where gas exchange occurs and now the blood is deoxygenated. The deoxygenated blood returns from the systemic circuit via the superior & inferior___39___ to the ___40___.

Answer 1

Starting in the right atrium, deoxygenated blood passes through the tricuspid valve into the right ventricle. During ventricular contraction the blood is expelled through the pulmonary semilunar valve into the pulmonary trunk and pulmonary arteries. The blood is carried to the lungs where it is oxygenated through a capillary network and returns to the left atrium via the pulmonary veins. The blood passes through the bicuspid valve into the left ventricle. Contraction forces the blood through the aortic semilunar valve and into the aorta. The aorta has several branches to deliver oxygenated blood throughout the body. The blood passes through capillaries in body tissues where gas exchange occurs and now the blood is deoxygenated. The deoxygenated blood returns from the systemic circuit via the superior & inferior vena cava to the right atrium.