Respiratory System
Bronchus
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The air then enters the Bronchus which also contains rings of cartilage around them to add strengths so they don't collapse on themselves. there are to Bronchus which each bring air to a different lung.
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Home
Nasal Cavity
Oral Cavity
Pharynx
Epiglottis
Larynx
Trachea
Bronchus
Bronchioles
Alveolar Sacs
Capillary Network
Red Blood Cell
Body Cell