Pulmonary alveolus
Keywords
isolated,
white,
background,
object,
education,
illustration,
drawing,
vignetting,
science,
scientific,
educational,
diagram,
air,
sac,
pulmonary,
alveolus,
lung,
lung,
system,
respiratory,
anatomy,
bronchial,
blood,
supply,
gas,
exchange,
carbon dioxide,
duct,
gland,
lining,
tissue,
connective,
bed,
hollow,
cavity,
human,
structure,
vector