3d
airflow
airway
alveoli
alveolus
anatomical
asthmatic
biomedical
breast
breath
breathing
bronchi
bronchial lining
bronchiole
bronchus
cell
cellular
chest tightness
chronic
co2
constricting
constriction
contracting
contraction
difficulty
disease
excess mucus
expanding
expansion
hologram
illustration
immunology
inflamed
mucosa
mucosal lining
muscle fiber
oxygen
pathological
pathology
pulmonary
relief
respiration
respiratory structure
respiratory system
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