Final answer:
Blood travels through the pulmonary trunk into the right and left pulmonary arteries before reaching the lungs for gas exchange, then returns oxygenated to the heart via pulmonary veins.
Step-by-step explanation:
In the context of pulmonary circulation, blood will flow through the pulmonary trunk into the right and left pulmonary arteries, which lead to the right and left lungs. These arteries further branch out to become arterioles and eventually reach the pulmonary capillaries, where the essential gas exchange takes place. Oxygenate
These arteries supply blood to the pulmonary capillaries, where gas exchange occurs within the lung alveoli. Finally, oxygenated blood returns to the left atrium via the pulmonary veins.