Number 9 is the
Once ____ blood leaves the pulmonary artery, it goes into the
___ .

Answer:
Once deoxygenated blood leaves the pulmonary artery, it goes into the
lungs.
Explanation:
The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. The blood here passes through capillaries adjacent to alveoli and becomes oxygenated as part of the process of respiration.