Capillaries
Lobule
true
No, but the blood leaving is.
alveoli
No
Alveoli, pleura fluid, lung tissue, blood
Oxygen from the air is diffused into the bloodstream in the lungs through tiny air sacs called alveoli, where it binds to hemoglobin in red blood cells. This process is facilitated by the high surface area of the alveoli and the thin walls that allow for rapid gas exchange. Additionally, the respiratory system has a rich network of capillaries surrounding the alveoli to quickly transport oxygen to the rest of the body.
millons of alveoli are in the lungs
Bronchioles.
No, blood is not transported through the alveoli. The alveoli are tiny air sacs in the lungs where gas exchange occurs between the lungs and the blood vessels. Oxygen is taken in from the air and carbon dioxide is removed from the blood in the alveoli.
One alveolus is a singular, tiny air sac of the lung, surrounded by a network of capillaries, and through which oxygen and carbon dioxide are exchanged. A cluster of such air sacs are alveoli (plural of alveolus).
Each lung houses about 300-400 million alveoli.