Answer:Blood is transported from the vena cava to the lungs in the following steps:
Blood enters the heart at the right atrium.Then the atrium contracts, and
the atrio-ventricular valves open.
This causes blood to pass into the right ventricle.
Then the ventricles contract, and
the semilunar valves open.
This causes blood to pass from the pulmonary artery to the lungs.
Step-by-step explanation: