Do Capillaries Wrapped Around the Alveoli?

Capillaries, which are small blood vessels with thin walls, are wrapped around these alveoli. The walls are so thin and close to each other that the air easily seeps through.

Are capillaries surrounded by alveoli?

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. The capillaries then connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.

What is wrapped around each alveolus?

Each alveolus is wrapped in a fine mesh of capillaries covering about 70% of its area.