(B) 2, 1, 19 ... is the answer
Answer:
The capillaries will connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.
Explanation:
The alveoli are surrounded by tiny blood vessels, called capillaries. The alveoli and capillaries both have very thin walls, which allow the oxygen to pass from the alveoli to the blood
