Google "alveous", there are pictures. Looks something like cauliflower with many air pockets.
The adjective for alveolus (singular) or alveoli (plural) is alveolar.
mammary alveolus
Alveolar macrophage cells work to clear particles from the alveolus by phagocytosis. If this process is overcome by continued build up of particles then the alveolus becomes damaged. Once an alveolus is blocked there isn't much you can do.
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).
of Alveolus
Capillaries
of Alveolus
Atelectasis is the imperfect dilation of the lungs or the collapse of an alveolus.
The alveoli (singular, alveolus) are the functional units of the lungs of mammals.
The alveoli (singular, alveolus) are the functional units of the lungs of mammals.
(Alveoli are the jaw sockets for teeth, or the individual air sacs in the lungs.) "In childhood, more than one tooth can occupy an alveolus." "In each alveolus of the lung, gases are exchanged with the capillary blood."
alveolus