Question: where does blood go when it leaves the pulmonary artery?
Evidence: When the right ventricle contracts, blood is forced through the pulmonary semilunar valve into the pulmonary artery. Then it travels to the lungs. In the lungs, the blood receives oxygen then leaves through the pulmonary veins. It returns to the heart and enters the left atrium.
Answer: The pulmonary vein
lungs