| starting with deoxygenated blood in the vena cava and finishing with the aorta. describe blood circulation from start to finish. | 1) blood enters the heart through the venae cavae and the pulmonary veins 2) heart inflated as blood enters atria and venticules througth A-V valves 3) full atria contact, "toppign of venticles to full capacity 4) A-V valves close; ventricles contract forcing blood out of th eheart through the semilunar valves into the aorta. |
