Alveoli in lungs. tiny air spaces in the lungs through which exchanges oxygen and carbon dioxide. 3d illustration
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human,
air,
background,
lung,
alveolus,
anatomy,
breath,
artery,
breathing,
bronchial,
carbon dioxide,
cavity,
capillary,
connective,
diagram,
education,
educational,
gland,
hollow,
illustration,
isolated,
lining,
lung,
object,
pulmonary,
respiratory,
science,
scientific,
three-dimensional,
structure,
system,
vein
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