Respiratory Gas Exchange
Air path from nasal cavity to alveolus and O₂/CO₂ exchange.
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flowchart LR
A[Nasal cavity] --> P[Pharynx]
P --> L[Larynx]
L --> T[Trachea]
T --> B1[Primary bronchi]
B1 --> Br[Bronchioles]
Br --> Alv[Alveoli]
Alv ---|O₂ in| Cap[(Pulmonary capillary)]
Cap ---|CO₂ out| Alv
Cap --> Heart[Left heart] --> Sys[Systemic circulation]
Sys --> Tis[Tissues]
Tis ---|CO₂ → blood| Cap2[(Systemic capillary)]
Cap2 ---|O₂ → tissue| Tis
Cap2 --> RH[Right heart] --> Cap