Book 4 - Self Instructional Manual for Cancer Registrars - SEER ...

Answer:QIODeoxygenated blood from the body returns to the right (side) of the heart by way of twomajor veins: the superior vena cava and the inferior vena cava. The blood from thesevessels enters into the right atrium (chamber). Blood is moved through the tricuspid valveinto the right ventricle (chamber). When this chamber contracts, it forces blood throughthe pulmonary semilunar valve into the pulmonary artery (vessel), sending blood to thelungs to be oxygenated.The oxygenated blood returns to the left (side) of the heart by way of the pulmonary veins(vessels) and enters into the left atrium (chamber). Blood then is moved through themitral valve into the left ventricle (chamber). When this chamber contracts, it forces bloodthrough the aortic semilunar valve into the aorta, sending blood out into the systemiccirculatory system.110